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#4124106 - 10/12/21 09:07 AM Big Block Swap!
Majestic Offline
Stranger

Registered: 10/11/21
Posts: 5
Loc: Ky
Hey guys, I am new here sorry if this is in the wrong place. I am seeking advice on big block swapping a 426 Hemi carbed Into a CV. I have a powertrain pull from a 70 charger with the 426 and 727 transmission. I’ve heard people swapping a 460 Ford but it was a tedious task. I’m really curious if there is anyway it’d work. The CV’s 4.6 was blown long ago, as that is how I came across it. I know not many people like interchanging brands, I don’t have a 460 currently, the CV is very rough, this is just something for me to try on a weekend to see if it could be done.

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#4124108 - 10/12/21 09:19 AM Re: Big Block Swap! [Re: Majestic]
Old_Guy_Stu Offline

Over the Hill

Registered: 04/28/19
Posts: 2658
Loc: Cleveland, OH
It'll take a lot more than a weekend.

Anything's possible if you throw enough time and money at it, but you're going to have to make engine/trans mounts, shift linkage, driveshaft, fuel system, etc etc. That's if there's even room. Considering how tight even a small-block Ford fits to the firewall and HVAC, you're gonna have a time fitting an Elephant in there.

Or you could sell the Hemi and buy five decent Crown Vics.
_________________________

1988 CVLX Formal Roof (Love Boat) POTM July 2019, Aug 2020, & Oct 2021, 56K
E-code lights w/ relays, LEDs w/ switchbacks, 15x8 Ansen slots w/ 255/60 BFG's, Kenwood stereo, various hacks.
This, of course, was merely the semi-delirious notion of a fever-patient, but I remember that it struck me at the time as being eminently practical and feasible.

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#4124118 - 10/12/21 12:00 PM Re: Big Block Swap! [Re: Majestic]
Majestic Offline
Stranger

Registered: 10/11/21
Posts: 5
Loc: Ky
Yes, I know it will be a challenge. Has anyone done a successful 460 swap write up?

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#4124128 - 10/12/21 01:08 PM Re: Big Block Swap! [Re: Majestic]
RF_Overlord Offline

Poobah

Registered: 12/14/02
Posts: 7711
Loc: MA
What year Vic is this Franken-motor going in? if it's pre- 2005, you may have an issue with the rear axle with all that torque. The shafts are only 28-spline.
_________________________
'03 Mercury Marauder (The Blackbird)
Trilogy Motorsports supercharged #61
Too many mods to list / Driveway Queen

'04 Grand Marquis LS Limited Edition (Spruce Green)
Daily Driver (Thanks, Adam!)

'00 Grand Marquis GS (Silver)
Rotted frame and broken transmission crossmember
Being resurrected...slowly.

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#4124142 - 10/12/21 03:16 PM Re: Big Block Swap! [Re: RF_Overlord]
Majestic Offline
Stranger

Registered: 10/11/21
Posts: 5
Loc: Ky
2004 however a friend had a few 2005+ models they used for dirt tracks

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#4124156 - 10/12/21 03:50 PM Re: Big Block Swap! [Re: Majestic]
GM_Guy Offline
Posting Addict

Registered: 12/17/00
Posts: 18695
Loc: London, Ontario Canada
If you got the shop space and not afraid to lose some creature comforts if necessary, anything is possible. =-)
No, don't know of any swap pages to send you to.
_________________________
Box stuff in the Box forum!

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#4124162 - 10/12/21 04:47 PM Re: Big Block Swap! [Re: Old_Guy_Stu]
dixiebandit69 Offline
5.4 Club
Member

Registered: 01/17/12
Posts: 340
Loc: Texas
Originally Posted By Old_Guy_Stu


Or you could sell the Hemi and buy five decent Crown Vics.


This sounds like the best idea.

"I had one lying around" is the reason for a lot of off-brand engine swaps that end up never getting finished due to unforeseen complications.
_________________________
2007 Grand Marquis LS: 5.4 swap, 9.9:1 compression ratio, Comp XE268s, NPI pistons, PI heads ported by me, Accufab upper plenum, 75mm DBW throttle body, Factory PI intake with Chinese spacers, CVPI dual exhaust, CVPI torque converter, CVPI air-box and zip tube, J-Mod, 3.55 gears, FMS Trac-Loc differential
17" Dorman CVPI steelies, BFG Comp T/A 255/45 R17s

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#4124164 - 10/12/21 04:58 PM Re: Big Block Swap! [Re: dixiebandit69]
Majestic Offline
Stranger

Registered: 10/11/21
Posts: 5
Loc: Ky
I’ve considered LS as well which seems to be the easier of the 3. I should have explained a bit further, every year my home town takes rat rods, retired county used vehicles, junked out vehicles, practically anything that is considered “dead” or forgotten and they breath life into it one day out of the year to give it one last hoo-rah. Everyone is making chargers, general lees and roadrunners out of the Vics. I wanted to try something a bit different smile

I know i want to do a different motor, i was thinking carbed big block but perhaps LS is more feasible.


Edited by Majestic (10/12/21 05:14 PM)

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#4124184 - 10/12/21 08:14 PM Re: Big Block Swap! [Re: Majestic]
SocalSam Offline
Over the Hill

Registered: 03/30/13
Posts: 2935
Loc: SFV, Calif.
If a tank engine fits, a Hemi will. Not sure what he is doing with steering shaft.

_________________________
2004 CV LX Sport #1, 57,000 miles -- Never was
2004 CV LX Sport #2, 121,000 miles -- Current
2008 CVPI Arizona Beige, 121,000 miles, 677 idle hours -- Current
2005 CVPI Ex-San Diego P.D. -- 2 month loaner


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#4124194 - 10/12/21 09:17 PM Re: Big Block Swap! [Re: SocalSam]
Majestic Offline
Stranger

Registered: 10/11/21
Posts: 5
Loc: Ky
That is insane! I’d be willing to trim off anything not needed. I know climate control would more than likely have to go.

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#4124196 - 10/12/21 09:25 PM Re: Big Block Swap! [Re: Majestic]
Becker34 Offline
Climber

Registered: 09/13/11
Posts: 667
Loc: Milwaukee, WI
Check out demolition derby forums/pages. Lots of guys are running 305's/350's/LS in Panthers and there's probably a few running SBM's. Chevy stuff isn't terribly difficult to drop in just to make the car move.
_________________________
Present Panther: 2000 Grand Marquis LS
Former Panthers: '92 Crown Vic LX, '89 Town Car

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#4124202 - 10/12/21 09:45 PM Re: Big Block Swap! [Re: Majestic]
dixiebandit69 Offline
5.4 Club
Member

Registered: 01/17/12
Posts: 340
Loc: Texas
Originally Posted By Majestic
I’ve considered LS as well which seems to be the easier of the 3. I should have explained a bit further, every year my home town takes rat rods, retired county used vehicles, junked out vehicles, practically anything that is considered “dead” or forgotten and they breath life into it one day out of the year to give it one last hoo-rah. Everyone is making chargers, general lees and roadrunners out of the Vics. I wanted to try something a bit different smile

I know i want to do a different motor, i was thinking carbed big block but perhaps LS is more feasible.


Don't risk damaging a real Hemi on a demolition derby.
Read what was said above.

I don't even like Mopars, but if I had a real Hemi (not the [censored] they're putting in Rams and Challengers these days), I'd do a lot better than a demo-derby car.

Also, demo-derby isn't about power, it's about strategy.
_________________________
2007 Grand Marquis LS: 5.4 swap, 9.9:1 compression ratio, Comp XE268s, NPI pistons, PI heads ported by me, Accufab upper plenum, 75mm DBW throttle body, Factory PI intake with Chinese spacers, CVPI dual exhaust, CVPI torque converter, CVPI air-box and zip tube, J-Mod, 3.55 gears, FMS Trac-Loc differential
17" Dorman CVPI steelies, BFG Comp T/A 255/45 R17s

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#4124228 - 10/13/21 07:05 AM Re: Big Block Swap! [Re: Majestic]
Old_Guy_Stu Offline

Over the Hill

Registered: 04/28/19
Posts: 2658
Loc: Cleveland, OH
You'll need a rear-sump oil pan for the Hemi, if you go thru with this. Personally, I'd be looking for a 318-powered Cuda to swap it into.
_________________________

1988 CVLX Formal Roof (Love Boat) POTM July 2019, Aug 2020, & Oct 2021, 56K
E-code lights w/ relays, LEDs w/ switchbacks, 15x8 Ansen slots w/ 255/60 BFG's, Kenwood stereo, various hacks.
This, of course, was merely the semi-delirious notion of a fever-patient, but I remember that it struck me at the time as being eminently practical and feasible.

Top
#4124246 - 10/13/21 03:31 PM Re: Big Block Swap! [Re: Majestic]
GM_Guy Offline
Posting Addict

Registered: 12/17/00
Posts: 18695
Loc: London, Ontario Canada
Since your not afraid to cut up the car, just go for it and tackle whatever gets in the way as you go.
There is an LS swapped crownvic in the performance section, might be the same guy who had a buick 350 in a vic (the photos are probably inaccessable now). But in anycase, its cut move weld if necessary. =-)
_________________________
Box stuff in the Box forum!

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