I think the engine will work fine with the cam I chose, I talked to the guys at the local racing parts shop, and I found out that there is a class of circle track racing that uses almost the exact same engine setup as mine, hobby stock class is limited to using production 76cc heads, 9-1 maximum compression, maximum 361 cubic inches, and he said the 508/508 lift cam I was looking at is the best one for that setup, it even noted that in the catalog that, and it's what most of the guys use, he said if I found some 305 heads with smaller combustion chambers that my compression would be upped to around 10.4-1 and the first cam I was looking at, the 530/542 lift would be the better choice, but if I stick witht he 350 76cc heads with the 9-1 compression, the 508/508 will be the better choice.