I have a couple quick questions about an upcoming swap that I plan to do. I'll start by giving some background on my truck. It is a two-wheel drive truck with the 4.9L, 300CI, inline six. It was originally equipped with a 3 on the tree but has been converted to the floor with a 3 speed Hurst shifter. The engine and drive line has 114,000 original miles. These all appear to be original parts. I want to drop in a 351 some time over the winter. The questions I have are as follows.
1.)I know I'll have to change the engine mounts and swap the cooling system but what engine mounts should I use?
2.)I plan on using a 351W from another truck and rebuilding it before the swap. Is this a reliable engine, in your opinion?
3.) What about a 4 speed? I plan on replacing the tranny because I want to run about 400 hp to the rear wheels
4.) What 4 speed, if any, will match up to the existing drive shaft? I hope to run a Ford tranny because I know it will outlast an aftermarket piece unless it is equipped for the power?
5.) How about rear end gears? I have a good feeling the gears won't function right with that much power. The existing rear end has super low gearing to go with the 3 speed.
Any suggestions would be really helpful. I can understand all the tech stuff but since it is my first swap I wanted to get some other input. Any other reference would be really appreciated. Thanks a lot. GreenHornet79

 

Pete, Bring the engine perches from the donor truck, as long as it is pre 1980. You can use perches either from a 302 or 351W. The 351W is an excellent engine choice, and is still modern. You can leave the rear gears in if you want to have a drag style truck. To go crusing you need a 3.00 or 2.75.
Have Fun! :-)
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Greeny,
The 351W is excellent. Get everything from the donor truck that is related to the drivetrain. Motor mounts and perches. Trans crossmember ect. If your really going to drag, I recommend a automatic trans (small block C-6, if you can find one.). You'll be able to establish more consistent track times. If you really think 400 HP and stay manual and want to race, you should consider a Tremic trans. I might have mispelled that. The T-5 gearboxes they used in the mustangs couldn't handle 400HP and with a heavier body you shouldn't expect any better. If you can afford aftermarket heads there worth it. If you can't, you've got the best factory small block head made. Get me the cast numbers of the heads and I'll tell you how lucky you are.
Good Luck, Have Fun,
KingFisher