Tunnel ram or no tunnel ram...

MOPARMAGA said

So your engine you have now, did I read it's just a really well built 400 block, no fill ?

Click to expand...

1973 400 block. Magged/sonic checked. It was Hardblocked to the bottom of the 'freeze plugs'. It had alloy caps, bushed lifter bores, 1960ish bobweight. 4.0" Crower crank, 2.1 journal 6.700" BME rods.