351W SWAP!!!

You need different headers, lower intake, and distibutor. And more than likely a cowl hood. The front accessories/timing cover/WP can all be reused. You can use the stock k-member. The stock transmission/bellhousing can be reused, but it's not a good idea. I've allready broke one T-5 with my 418 .

If it's a hyd roller block, you can use standard lifters. If it's an older block, you will need to use the $400+ hyd roller conversion lifters.

You can use 5.0 heads, but they will need to be drilled to use 1/2" head studs. I know the AFR 205's and 225's are made to use 1/2" studs.

That's all I can think of right now...

Also, you might want to search because this topic has been discussed several times allready.