Originally Posted by Houman SS '70
But Glenn, with 400 rods and 350 block 4bolt, and 400 rods, don't I need any other machine job, except the crank journal?
Thanks for your comments, and one more question, would it work with 2bolt main block?
It's really no different than turning a 350 crank undersize you're just removing more material. That's the beauty of using the 400 rods you can use stock 350 pistons and the only modification necessary is to grind down the main journals on the 400 crank. It then bolts together with no clearance problems between the rod bolt heads and the cam. The 400 rods use a shorter rod bolt that sits deeper in the rod and provides more clearance. It's not necessarily the "best" way to build a 383 but it is definitely the easiest and it does produce a motor with strong low and mid-range torque. If properly maintained the short rod version should give years of service. You will also need the 400 balancer and flexplate/flywheel but I'm guessing you have access to those.
Best of luck!