351w swap

[6T9PONY]

Originally posted by 82 GT
That's the first time I EVER heard a statement like that about 69-70 Windsor heads! I could be mistaken, but aren't they the best 351w heads made? Small valve sizes can always be replaced with larger ones.
Besides the Cleveland and Boss heads, what year Windsor heads are the best in your opinion......post '74-up smog heads?
Please fill me in here. Like I said before, I could be mistaken but I don't believe I am.

'69-'70 heads are definitely the best STOCK 351W heads ever made, but they still suck. Rather badly. 1.84/1.54 valves.....no good. There are probably some damn fast 351Ws with stock/semi-stock heads, but to easily take advantage of the rest of the engines potential you need aftermarket heads. Just offering my humble opinion.