[my4by2]

He's right - if you've already got a good core 350, then just go with a 383 - you can spend more on the internals due to what you'll save not having to buy the parts & core for the 454 swap. Only way I'd go 454 over the small block is if it were gonna be a pure tow rig just for that extra bottom end low RPM torque the big block has. You'll love the way a 383 puts ya back in the seat I guarantee it!!!