The strongest ford windsor block in the 8.2 deck is the Mexican block though it is only slightly better than an early block. The later 5.0 blocks lost alot of strength with weight loss program they were put under. There are many people getting 550 HP with them usually using a supercharger or turbo. N/A can also get there but revs are high so more stress on the block. In all case you need to build it carefully and tune it well. Your on the limit.
Having said that with a 366 as your limit then a 351W block (early is better) is a far stronger option than the 289/302 block and will be fine through to 700 HP. Again forced induction is the best option or making them bigger makes the goal easier to get with less stress on the engine.
Choose then we can talk about how and under what budget.
351 windsors were used up to Xw, and were also used in F series trucks in the 80's-90'sback in that 80's when I was working in Rocky for Telstra we have a 150 which has 351W and manual box. think you get them in Bronco's as well.
Last edited by Shaunp on Mon Mar 06, 2017 7:44 pm; edited 3 times in total
351 Windsor is the go. F truck might make the rules as they were mass produced (200+ needed to be made). At any rate, can an early block be changed to roller cam? If it's solid and that helps reliability and power then so be it
351W - offset crank to 3.6 plus 20 thou over is a 365. This is old school. You would be looking at dodge 360 rods and various mods to make it work but it can be done. Cost - no idea need to ring a machine shop or two.
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