big block fiero
New Member
Could someone that has a 8/6/4 cam put it in a block, measure off a lifter with a dial indicator,and check the base circle runout from ramp to ramp. many would suspect that this would be zero but I suspect something unusual like .010 or so. ---------Typical reaction may be "gm is trying to save money in mass production and doesn't hold there machining tolerances on the stock junk".