Not Ranked
You really do not need an aftermarket block for a 500 hp windsor.
Heck, how much power are the 302 mustang crowd putting through their factory blocks in the forced induction drag race scene, double what you want? We sold lots of stroked 351w's that did make an honest 520 hp on pump gas, warranteed them, and never had a block related failure. Even left them as 2 bolt main caps, with ARP studs. My experiences with hipo winsors is the most common failures are the head gaskets getting blown out, they only have 4 bolts around each cylinder. You can buy whatever year windsor block for $150 then spend another $500 machining it. If money is no object, then go ahead and do it for the cool points, but without a ford casting number, I am unsure of the legal aspects of that block in some states. My hopes for aftermarket blocks are the 750+ cid big block combos, not ever released in a production car.
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In a fit of 16 year old genius, I looked down through the carb while cranking it to see if fuel was flowing, and it was. Flowing straight up in a vapor cloud, around my head, on fire.
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