What hp do you think
 

I am building two motors they are 468 cu in they are 8:1 compression dart pro one aluminum head 310 cc Coustom c to match b&m 250 blower with 6# of booste how much horse power do yor think it will make

550-570 hp depends on cam profile

Thinks I am getting with a camotion on cutting a cam

Exhaust, and cam specs?

I'll say 600-650 with a good cam. Considering, a 525sc plus better heads, bigger blower, more compression, and assuming you use a better cam.

hard to say , 675ish with those heads, and a good cam, single or dual carbs?

600-625 hp would be my guestimate

Dual carbs header

625

My guess is 600HP. I would caution about going any higher than 6 lbs with that 250 blower. It will heat up the intake air temp and cause detonation which will kill a boat motor quickly.

My guess would be tween 660-700 hp i had a 502 stroked to 540 9:1 compression 320 dart race heads with a weinand 256 with 2 750 cfm at 4 lbs of boost and it made 825 hp 6200 rpm and was more fuel friendly than when it was making 625 hp with a single dominator

625-650. Had 2 very close. Keep it at about 5-6psi boost.

anywhere from 500 to bang depending on the engine builder