I made a 505 C.I. pump gas motor for my old street Duster, it was a 400 block stroke to 4.250 and it was bored to 4.375. I had a set of 906 heads fixed up with 2.14 intake valves with 1.81 exhaust valves and a LITTLE bit of hand porting. I put a Comp Cams solid roller that had 260 duration @.050 with .420 lobe lift on the intakes and 266 @.050 with .409 lobe lift ground on a 108 LSA , I installed the cam with the intake lobes @ 106 ATDC, 2 degrees advanced. I use a set of 1.6 ratio rockers and a low deck six pack with a set of 1970 440 automatic carbs. 1970/1971 Hemi/Six pack 6 quart oil pan with a home made crank scraper and a stock Mopar windage tray.
I was hoping the motor would make between 550 and 560 HP, it made 592 HP at 5000 RPM on the first pull with over 600 Ft. Lbs. torque at 4500 RPM
I did a bunch of tuning and parts testing on that motor that day on a DTS engine dyno, the best results were 612 HP at 5500 RPM with 644 Ft. Lbs. torque at 4500 RPM.
I had built a 1971 Duster with ladder bars and coil over rear suspension to race the black guys on the streets in L.A. CA, that didn't happen
I was hoping the car would run between 10.70 to 11.00 on M/T ET 315x60x15 street radials with me in it, the first pass I made with that car was 10.69 at 124. + MPH cork up with the six pack air cleaner on
I ended up swapping a bunch of parts on that motor and the final build made 727 HP with a set of Indy SR heads with Max wedge intake port sizes and a Indy 400-3 intake manifold with a early production1050 CFM Holley list # 9375 non HP carb on 91 octane Oregon pump swill, the best ET and MPH with that combination was 9.993 ET at 134.+ MPH weighing 3450Lbs . with me in it cork up with the air cleaner on and with the full 3.0 inch exhaust system on
On your deal we need to know exactly how many cubic inches and how much true compression ratio it has before we can help you get close the the power it may make.
I'm a drag racer, not a show car guy and not timid in the pursuit of power. That cam is not to big in my opinion and it will work fine as long as it is not retarded, it will probably run real well installed from 106 to 108 on the intake lobe centers
BB Mopars rule, I love whupping up on Hemi motors