Re: Questions on 351w build
It really depends what you want and the budget
A good rebuild on the 351 with the Windsor Jr heads will be a strong runner, but not pull as hard on top as you'd expect. The heads just don't flow enough. However, if you built it with a set of .030 forged pistons, good rods, stock stroke at 357 cid, I'd run between 10-10.5:1 compression with 10.25 being a sweet spot for me with the Windsor Jrs, it'd be a stout 357. Zero deck I'd guess 12 cc on the dish, but you'd have to do some calculating with the head gasket and exact pistons you chooose
If you are going to go stroker, it'll make more torque, but the heads will limit the peaks significantly, still way better than a stock head, but not enough for a deep breathing stroker. Same target for compression with a 408, but would certainly take a lot more dish in the piston. Zero deck I'd guess 22 cc on the dish, but same deal, you'd have to do some calculating with the head gasket and exact pistons you choose. In this case I think the heads would quickly show their limits though
As far as porting, in either case, porting will help significantly, the Windsor Jr could likely gain 50 cfm with a good port and valve job.
70 Sportsroof, 427 FE/489 cid, TKO-600, 31 spline 4.10, A/C. modified Mass-flo EFI/reprogrammed A9L/CnC ported Victor.