Around 190 horsepower the problem with any 460 past about 1974 is that they have the emission style heads on them, they are very restrictive, so not much horsepower out of one.
how much horse power
250
245 H.P 400 FT. LB torque
No, those are low compression heads 8:1 I believe and they won't flow any better.
I have a 73 460 engine what exactly do you want to know??? I might be able to help
.044 inch ( according to fordparts.com )
460
405
Ryan's Hope - 1975 1-460 was released on: USA: 14 April 1977
460 horsepower
460 miles = 740.3 kilometers.
100-460 or so