Thoughts on the 452 heads

I did that on my 500 stroker. I pocket ported and port matched them and installed 2.14/1.81 stainless steel valves and new valve springs, keepers, locks and seals. By the time I was done I had about $1,000.00 tied up in the heads. When I did it there weren't a lot of affordable aftermarket heads, and they flowed pretty well but stalled at about 450 lift. If I had it to do over, I would invest the same money in a set of brand new stealth heads. By the way, I did break through into a water jacket on one head and have to start over.