340 build advice

Hi all, I picked up some new 30 over pistons in Carlise.They are from what I have looked up...8.5 CR L2385F Fed/Mog.I have the 1971 340 all stock that I bought at the end of the winter.I want to build a nice street engine for pump gas that will make about 375 H.P. I will be using the stock J heads Comp Cam 286/491.
I have a LD340 intake to use.Any advice would be great! Please keep in mind I'm on a fairly low budget.Thanks in advance!! Craig.