442 jack,
I have roller rockers installed on 3/8 rocker studs with guide plates and still run stock elelbrock valve covers, i don't have air but stock ps,alt and brkts. i will help you with this motor as much as you want me to.
Robert
69 442 go onto
www.69442.com, gallary page #6. yellow car in louisville, ky. that is mine.