400 stroker rookie

I don't think the FI will like the long duration of that cam, it should probably have more like 112 or 114 LSA for nitrous and FI.

If you already have the maincaps and girdle, using it won't hurt anything, and could help. I use aluminum caps on my engines, I think it's cheap insurance. S/F...Ken M

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I`d use the alum. caps and girdle if I already had them. I know a guy that built a 500" duster, (my ex partner was in on it ), he had to go to alum.caps, and back the throttle off to make his live, he backed it of to 9:60`s . I don't remember how many blocks he broke, even one of the aftermarket jobs ! Just make sure their set up right .-----jmo
I haven`t had my engine on a dyno , but the best three engine programs say 755 h.p. w/ my cam change /down from 761 . /// WHO REALLY KNOWS----