Posted: Mon Jul 05, 2010 6:06 pm
Tom,
Looks like they may have had a little bowl work, probably standard heads, oval port, closed chamber. They work really well in a heavy door car on the street, a full size road legal yank with a 454 and these heads won't outrun your mazda without a fair bit of gas. If you are planning race only look for the rectangular ports and build the bottom end for 8k revs. 8-71, roller cam and you are past 1000hp. If they go for 3-400 then its a fair price, anything more is too dear. Newish bronze guides and the roller rockers are all that really make them worthwhile. Bare oval port castings go for about 50 quid a pair. Oh yeah, Older chevy heads do crack around the valve seats, for a street car not a problem, but for racing a big problem waiting to happen.
Alan
Looks like they may have had a little bowl work, probably standard heads, oval port, closed chamber. They work really well in a heavy door car on the street, a full size road legal yank with a 454 and these heads won't outrun your mazda without a fair bit of gas. If you are planning race only look for the rectangular ports and build the bottom end for 8k revs. 8-71, roller cam and you are past 1000hp. If they go for 3-400 then its a fair price, anything more is too dear. Newish bronze guides and the roller rockers are all that really make them worthwhile. Bare oval port castings go for about 50 quid a pair. Oh yeah, Older chevy heads do crack around the valve seats, for a street car not a problem, but for racing a big problem waiting to happen.
Alan
cheers mike