360 street build, please critiec

gregsdart said
Magnum 5.9, 30 over, compression 10 .5, EQ 318b heads with bowl work and 2.02 ,1.60 valves, six pack, TTI 1 5/8 TO 1 3/4 step headers, cam will be hyd roller of roughly 232 x240 @ .050, 108 cl, about .480+ lift using chev 1.6 rockers and olds studs. I am considering this as a possible combo for a 4 speed 1973 duster my son and i hope to purchase. It was a car i bought for my son in 1988, got sold, we are hoping to get it back and build this motor for it. Rear gears will be 3.55 or 3.73, tires 28 tall. I am hoping this combo will build very good torque from 3,000 up to about 6200 rpm and live well. Opinions? Similar success stories?

IMHO, I’d use and do so currently use a cam one size smaller.
I happen to run an off the shelf Comp Hyd roller, cam card below.
I also use TF heads which increased the compression 1 point better than your build. A RPM & 750 top it off.

Power to 6K plus is not a problem and I’ll say it is due to the cylinder heads flowing so well which allow the cam a few mornRPM’s not normally available to a stock port head, which your are not as I read.

Lift is another thing I have a bunch of going to .573. Which works with the high flowing ports. IMO, that’s a key thing to the upper rpm power hanging on.

The car is a ‘67 Cúda with a custom stall converter in the 904 & out back are 3.55’s on 26” tires.

3.73’s would work a bit nicer on the street for you and I, IMO.
Or higher.

If I did a change to this Cúda here it would be 3.90’s and a maybe, maybe a taller tire. As it is now, I barley get out of 2nd gear at the track and I’m short shifting at 5K.

Enjoy brother!