440/505 rpm limits

900 ! I`m sure mwuays is not close to that ! Computer programs (not dyno) , says 761 after going to smaller cam for the fuel inj. map readings.
little larger than standard cnc ports,"not max wedge" , victor knock offs, flowed 354 @.600. raised my initial timing to 24 , 505 likes it .
Just figured out this morning , my rack and pinion is worn pretty bad too---------------always somethin !
Andy ,have u run the 1/4 in the duster yet ??

Victor knock offs with standard sized ports will have the max power lower than 7000 rpm on top of 500 inch shortblock. Peak might be down around 6200 or there abouts. You can safely rev it higher but it will most likely be laying over after 6500 rpm. You can get it on a chassis dyno to test it.