400 low buck dont give a

The low deck motors can spin a lot of rpm, with the proper combo they'll spin like a small block, I have a 400 myself and a while back was doing a lot of google searching and there's a lot of guys were talking about spinning stock bottom end 383s and 400s well past 6grand some as high as 7 grand or more, with the ported heads, tm6, 750, and 509 it may not have much down low and wouldn't want to live well at low rpm but full throttle high rpm it'll wake up. You guys dissing the low compression motors but there's been a few that with bolt ons have made over 400hp read this article An Error Has Occurred! they made over 400hp without ever going above 8:1 compression on roadkill they slapped eddy rpm heads and an old isky .484 cam and made pretty good numbers in their crop duster, look up roadkill crop duster on YouTube the smogger motors were dynoed with all the emissions crap on them as well as all accessories like alternator, Ac, smog pump, and older ones were dynoed without all that stuff robbing hp so by time you scrap all the emissions crap the only thing holding them back power wise was the lower compression there's somewhere on the inter web they did dyno comparisons between smogger 440s and older high compression 440, with just the water pump no other things hooked up and there was only about a 40hp difference...