I have a early 90's hp 465 that i have put put a crane 731 cam , full roller, merlin grumpy jenkins steal heads , dart intake , holley 800 dbl pumper. The exhaust glm with hardin risers. ( 4 inch )
The builder thinks maybe 575 hp ( i am not sure about that )
well the question is new exhaust or bigger carb and what do you think the hp is and what do i do next.. Looking for winter project to do with the motor

I'd say your done unless you add 4.25 stroke rotating assembly.

Your say stroke it, what do you think i would get if i do it, wouldnt that make it a 540 thanks

i would say get rid of the glm's, they have to be choking that motor..

Ditto.

The engine will make about 525HP. The carb is plenty for it.

Assuming your engine is a 4.00 stroke, 4.477 bore now -(502 ci.) then adding .250 stroke would make it a 533 unless it is bored .030 in a standard rebuild. I agree on the GLM manifolds, they are better than stock but not much.

Thanks for the info,