#6 heads vs #7A
#1
#6 heads vs #7A
Hi guys been awhile since I been on I've trying to run down parts for my car. Got a question I have a 72 cutlass supreme with a 350, I found on ebay a pair of #6 heads from a 1970 350. The bid so far is $220 plus $85 in shipping. Now is it worth it to try and get these heads or just take the ones I have on mine and get them worked on as in getting the bigger valves etc, or is there a big difference in cc and compression and valve size and how much would you guys pay for the #6 heads? Thanks again for all the help and advice!
#2
There isn't any difference in chamber size or valve sizes between the two. Personally, I would spend my money on the 7A heads unless you can't have the vehicle down while the work is being done on your current heads.
#3
If you want higher compression you'll have to mill the heads, deck the block, replace the dished pistons with flat tops, or a combination of the above.
Don't just throw parts at it, it's a waste of money (ask me how I know). Write up a plan, starting with your desired results, and work from there.
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December 7th, 2020 06:43 AM