Questions on Engine swap
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125 Posts
Likely not. 351 has a higher deck, thus needs longer headers.
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7,986 Posts
They are completely different
Mike
Mike
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1,644 Posts
Boy the 4.6L didn't last long. Good luck on the 351W. Is the engine ready to run or does it need a rebuild? If a rebuild is in order, consider a stroker upgrade as it 363, 393, 408.
In moving from the 4.6L, I believe the modular engine mounts are different from the SBFs.
In moving from the 4.6L, I believe the modular engine mounts are different from the SBFs.
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1,628 Posts
Yes, I believe you’ll need to move your mounts with this swap.
And possibly a different driveshaft length
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220 Posts
Do you if FFR has different drive shaft length for the IRS units and the solid axel unit cars?
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12,127 Posts
Headers, engine mounts and the big one is the transmission &/or bell housing. If it was built using a T-45 for a 4.6 the transmission’s integral bell won’t mate to a pushrod engine. If it was built with a 3650 or r TKO the trans could be used but the bell housing would have to be changed.
Jeff
Jeff
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7,986 Posts
No need to move the mounts. They are the same on the chassis for all engines.
Mike
Mike
Thanks for all the information, the transmission is 3650.
I am still deciding on what I want to do, the 4.6 spun a bearing so have to pull it anyway.
How hard is it to remove the body on am MK3?
I am still deciding on what I want to do, the 4.6 spun a bearing so have to pull it anyway.
How hard is it to remove the body on am MK3?
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12,127 Posts
Remove:
Doors
Hood
Trunk lid
Sidepipes
Bumpers
Roll bars
Windshield
Splash panels
Radiator aluminum
Disconnect light wiring and wipers if applicable
Remove 4 bolts in the nose
Remove 4 bolts down each side
Raise the rear, go forward, raise the front and take it away!
I can go from complete car to body off in about 2-3 hours—-but I’ve done it a hundred times. All that said it is possible to R&R engine with the body on.
Jeff
Thanks Jeff.
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26,364 Posts
Agree. Don't even think about the body. We see most guys using an engine hoist but to me they offer as many problems as they solve. I use a come-a-long from an eye in the ceiling. BUT really important, either way, is a good engine leveler. Especially if you pull engine/trans as one unit, it needs to make substantial changes in the angle it hangs looking at it from the side. And you need to be able to change the angle w/ the 6-700#s hanging from the leveler.
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528 Posts
Do a search for engine removals from the cobra. Lots of advice out there. I did my swap using an engine hoist, a leveler, and a small floor jack under the transmission with a minimum of problems. Take the front wheels off and drop the front end for a better angle. Have a couple of buddies help.
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1,644 Posts
The TR3650 has a integral bellhousing with the case, can't be separated, The transmission was designed for Ford modular engines. So not designed to be used with other engines.
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