I took a scap piece of plywood and drilled holes where the intake ports are of the head. I then used a pattern cutting router bit (the kind with the bearing on the bottom) and used the cyl head ports as a guide to cut the plywood ports. I then used THAT as a guide for my router, with a bearing on top bit, and cut the intake to match the head. A bit tedious but it was fun and I did it myself. I gooped it up with some high temp RTV at assembly and cut the excess off afer it dried. Leak free after about 2000 miles now. Good luck
Last edited by Shipwright; 01/05/2008 1:31 AM.