[bcsledhead]

has anyone tried to hog out a 583 and turn it into an H.O ?

 

[440racer]

I've heard of ppl swapping out the 583 rotary valve for a 670 and they have had great sucess. I have also heard of a ppl swapping the 583 jugs for 670 jugs but I never heard of the out come.

 

[bcsledhead]

501 rotary valve is known as the nasty where we live. thanx

 

[argento]

Originally posted by bcsledhead
[br]501 rotary valve is known as the nasty where we live. thanx

I have a 501 rotary in my 93" Mach 1 670. They came stock on the 93",and were holdovers from the 92" X model w/ twin pipes and 44mm carbs.
The 501 is a 169 degree duration valve. Kick ass.[]