I can't imagine what your dad was thinking. Actually, the 383 and 430 use the same block. Maybe he found a 383 cheap and put the SUPER MARAUDER intake on it?
Maybe look around and find a 430 crank? The SUPER MARAUDER was rated at 400HP. I believe EGGE has crank kits. The 383 will get it down the road, but a 430 will make it scream.
The F/4/S is the TOPLAODER. It is unbreakable. I have one here from a '73 COUGAR 351C CJ (with factory HURST shifter). They come in various lengths (measure your present 3/S) and give me overall length. Is yours (3/S) synchro in first gear or is it a slider?
It may be that your machine shop can get you a crank kit and that would leave only pistons and rings you would have to come through with (usually the machine shop can get parts cheaper than you can).
Have you decided on cast or forged pistons?
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