Small block compression

A normal compression of 150-170 is whats needed.You either have a smog motor with no cam,or a motor on its way out.What,s even a better test, is a leak down test to determine what is leaking.has your motor ever been opened or rebuilt?,and what was done to it?You could have badly seating rings or ones that are toast,or valve seats that are done.One other that can cause this is a badly installed cam,not degreed right,causing low compression.Mrmopartech