318/360 heads,with thumper cam

273 thanks for the big help.i think im just gonna mill the heads,maybe hold off on the zero deck,and run it as is,get an rpm intake,what im gonna look for are some magnum heads,sounds like best thing to do,then i can buy some cheap chevy roller rockers,but i have not seen a complete magnum block for sale,or found one anywhere,so that'll have to wait for awhile.- OldmanRick thanks for the link,do i go for the performer rpm,or the rpm airgap?also would an m1 intake be a good manifold,theres one for 90 bucks,and a torker for 50$.. -oh and 412 stroker im glad to hear the thumper is somewhat good for performance,as everyone baggs on me for buying one,saying its not much better than the stock cam,but did he say that about the roller versions,the mother thumpers,or big mothers,as i have the smallest,and hydraulic flat tappet? thanks everyone for answering my questions.