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i am wanting to run roller rockers on my red 186 but the head i have has press in rocker studs and the roller rockers i'm looking at have threaded bolts instead. how hard is it to tap the head for the bolts or is it better to just spend an extra $100 and get roller rockers that will mount to the press in studs? any help would be great.

if you are using mild cam and valve springs press in studs will be ok if using hi lift cam and high spring rate these studs have a habit of pulling out you can pin them to stop it later model heads with bolt down rollers are the go

thanks sloth, i'm thinking fairly mild, i do want that lumpy sound though. i'm thinking later model heads will be on the agenda. thanks for the help.

For a mild motor roller rockers are a bit overkill aren't they? Well thats what I've heard, unless your revving up to 7k rpm regularly you just don't need them,Trev .

sorry yeah i mean mild as in will idle under 2000 rpm, i will be running up to 7000 regularly mainly when towing up all the huge hills around here and when i go out to the local track to show all the p platers that you don't need a rice burner to get performance. and knwing me, as the build goes on it will get more and more out of hand. and i'd rather go overkill than have something fail on me a long way from home.