[lanierledford]

I was wondering about the tool I saw for $30.00 on e-bay for a tool which with the use of a drill motor and a 5/16 drill bit you'd use to open up the hole through the head for the push rods when changing from 1.5 to 1.6 rockers on a sbc. My question , how does it work and do you really need it. It looks as tho you'd slide it oven the bit, place the bit threw the head, and slide it down to head. While the tool rest under the lip of the head, where the valve covers seat, with the drill running, you use a wrench to turn the tool causing the bit to lean reaming the hole as you turn the tool creating an oblong hole threw the heads. I was planning to use the 1.6 rockers and was going to check the clearance, but if I need to enlarge the hole, I can do it first. How bout some wisdom guys. thanks marcel

[Ratchet]

Sounds like a pretty trick tool. If you don't have access to a milling machine it might be the best alternative. I have used a carbide bit in a die grinder to do the same job in the past.