another 383 build up Q

First let my say I love 383s and for a nice driver they are great, for 600 HP I would use a 400 block and 440 crank, heads for 600 hp I was going to try indy heads for my next build as my 906 heads ran out ~ 450 HP on the last 451 I built. But BJR may have built buildups using the new max heads with luck so I would not counter his advice, I would just start with a 400 block and 440 crank I used long rods and forged pistons, like BJR said a very light rotating assy.

The forged pistons with the pins near the oil rings was not the best for a daily driver as there was a lot of piston slap. I got 30K miles out of it before I had lower compession on 2 holes and it was after I sold it so I never knew if it was in the heads or rings. I understand there are more stable forged pistons than I found 10 years ago.