I have a 4.00 stroke 400 block build planned -decision is do i use my RAIVs or soem Speedmasters.[/QUOTE]
I would use the RAIV's. A 428 RAIV should have happened in 1969 and the LS1 Ram Air Super Duty would have been nice to see in 1970. Even a 1970 455 with a RAIV top end would work as well. Hemi who? What is an LS6?
If John D. was still Division Manager in '69 &'70 I think one of the versions above had a chance to come to Market.
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