I have a very similar motor to what you want to build. I used Rebello's 3.0 liter kit that uses the offset ground crank, Eagle 138mm rods and JE 89mm forged shallow pistons. My head work was done locally and I used Isky's 290 duration-490 lift cam. I used stock 280 valves. It is a blast to drive on the street and the track! But I have some friends who built turbo 280's that are much faster than me for less money. Mine sounds awesome though.