Hey, me again. Have another question for you guys. Looking to build up my smog engine. I have stated before that a friend of mine has a set of done #370 heads . They are 64cc off of 69-70 car/truck.1:94 1:50 valves. Anyway the reason I was going to put them on my engine was to increase the sorry 8.2 CP. I cam accross a set of done 58cc heads on ebay. ITEM NUMBER 8030999267. They are also done and have the same valves.Check them out. I wonder which set would benifit me best. Remember, I am only building a street engine. Just need some more power and don't want to spend the big bucks. How bout your opinion Tech Inspector.???