I had a 472 that had compression issues. I bought a low deck Indy block off a guy on here. I had Ohio Crankshaft put sleeves in the block, I also used their 4.25 stroke crank, their rods, with Diamond pistons. They balanced it. I bought a set of Trick Flow 270s and set them up myself. I assembled it. The only part I used over was the Comp .665 roller cam and lifters. Video was first fire. Only problem I had was my battery sat for 2 years. I tried charging it for 2 days but it cranks slow. I also only had 5 psi of fuel pressure and need to bump it up.Its a mild 540 street car that will see some track time at the mopar events. Birdtracker