Re: 351 Clevor
Procomp heads? Ah heck. You already have good Cleveland heads and a Cleveland block right. Why would you put not so good Procomp heads on it and then go to the trouble of putting the good Cleveland heads on the Windsor block? This doesn't make a whole lot of sense to me.
Honestly the best, simplest, and most cost effective thing you could do would be to use your closed chamber 4 bbl heads on your Cleveland block. Get a 393 stroker kit if you can afford it. Keep it to 357 cubes if you can't. Buy a good 4 bbl Cleveland intake manifold. No need for spacers, or conversion intakes. Get your 4 bbl heads ported and put in a big solid flat tappet cam. You'll make a bunch of hp.
Then sell the Procomp heads and leave your 351W block for another project. For the 351W, either buy some more Cleveland heads if you want to pursue the Clevor deal or better yet just sell the Clevor pistons and buy some good aftermarket 351W heads.
IMO, I think you are making your buildups uneccessarily complicated and expensive for little if any gain over something much simpler.
I do dig the idea of a Clevor, but I thought (assumed) you had two sets of Cleveland heads, one for your 351C block and one for your 351W block. I just assumed that was why you wanted to put the 351C heads on your Windsor block.
1967 Cougar. 432 cid FE. C6, 9 inch rear.