Jack, if you want to go retro roller I'd look at the Lunati Voodoo line as I just installed the 60112 in my 350. It idles decent, no breakin as it's a roller. The things I had to order to make it work are shorter pushrods and a Cloyes timing chain cover with a roller cam button to keep the cam from moving .I have a vid on the site with it idling.