Thanks guys. I have a feeling my wallet will agree with you. I definitely want to rebuild the original RA III 400 block to be as stout as possible, so I’d rather spend any ‘real’ money there. As Will suggested, I am going to cc the 428 pistons and the 670 heads and report back here. I just ordered a kit from Jegs to do this (this will be my first). I’m not opposed to swapping out cylinder heads if I need to pick up a set of 6X-4 (Jay’s suggestion), but if I spend $4000+ on upgrading the 428 short block, then I am going to have to delay the work on the 400 for a bit of time.
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Three times the sound peaks, falls back, peaks again. A throttling back to cruising speed, a dwindling grumble of thunder and...gone.
The frogs take up where they left off.
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