283 power pack valve clerances

what are my tolerances for side to side play in the guides and should i check dry or oiled.

next i have never installed pushrod guides do the go under the screw in stud or under the rocker. and what size stud should i use as far as lenght goes i have seen multiple lengths i will be useing roller rockers. and do i need to use longer push rods due to the guides??


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Shoot for around .002 for clearances in these heads. Most have more. To install guide plates the stock studs will have to be pulled. Then the stud bosses cut flat + about .380", the bosses threaded 7/16 c for the hex shouldered screw in stud. Guide plate is held between stud hex and head. Do not use guide plates and stock guide slots. Drill the stock guide slots round. Seal the threads of the new studs. Most machine shops or good parts stores will have the correct stud for your application. Do not use the +.100 longs with your stock valves etc.

i just got done pulling the old studs and threading the holes. on these heads should i run guide plates or just leave the factory ones there? i am going to have valve guides installed some have more play then others. i dont want any probs. i am running 1.6 to 1 roller rockers. and a lunati(00010lk)cam .480 at a 230 dur lob sep 109 and matching springs.

i am droping everything off tommorrow at the machine shop if i dont install guide plates do i still need to get the tops of the bosses milled?

i just got done pulling the old studs and threading the holes. on these heads should i run guide plates or just leave the factory ones there?




when you tapped the bosses did you use a kwik-way head standand how did you cut the stud bosses down?

never cut the bosses just used a stud puller/tap guide i need to get them milled. i think? if i am not putting guide plates do i need to get them milled?

and i tapped them by hand (it was alot of fun)