Hey guys thanks for the responses, I am a first time engine builder, and a lot of the parts listed are what ive read from other engine builds I have read online, I understand the difference between flat tappet an roller camshafts, and honestly the only reason I went with flat tappet was the cost, and the kit came with cam an lifters, springs, retainers, and keepers, I just need new valve guides. the pushrod length was 8.00, I put the decimal in the wrong place, and I got that number from the engine build I saw with a similar cam, but I appreciate the post of the video on rocker geometry, and im definitely going to remeasure so I can get it perfect, how do you remeasure the lift with the 1.6 ratio rockers, an the engine casting number is 10243880 I believe, an the head casting number is 10239906, I don't know where to find the suffix number