Thats great, but if I use 3/8" studs, I wont have to drill, or are the original, pressed in studs? If so that makes sense. On the pushrods, why do they offer the +.100" rods, is that somehing you need to do to correct geometry or something, or can you renain at std. Are the +.100's for the 1.6's and the std for the 1.5's. Told ya this was new to me. Thanks.