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I ran one for a while 421" with eddies,then battens and finally indys had a 618 roller and many nos passes. 69 340 block with stock caps, sold it to a guy in Ohio so it might still be running.



That would be me, lol. Still working on collecting parts, I bought a 7 bedroom house that needed remodeled so that slowed me down alot. Still keeping my fingers crossed, it won't be at the rpms or power level you had it, so it might last awhile. Its getting a pair of ported long-valve Econo W2's and thick head gaskets for a drop in compression to about 10.4, and a solid custom grind cam in the upper 260's/270's@.050. I doubt I will be close to the 600hp mark, and I won't be running any NOS or anything.