454 Chevy

[biggraypig]

I have a 454 Indmar Chevy engine in my boat that I would like to get a few more ponys out of.
Block #14015445
Heads #14092360
Intake #333841
Don't have the cam #s
What I have found out is it is an 87-89 truck block, 85-89 open chamber heads (2.06 intake, 1.72 exhaust), and what looks like a 73-75 intake with the oval ports.
The boat is an 87, so I am assuming the block and heads are 87.
Am I in the right ballpark or not?
What I would like to do is cam it a little, upgrade the intake, and go to an HEI distributor to get a few more ponys. I don't need anything drastic, just would like a little more. (I know once you start it is an evil addiction that you have to feed. Could I run a blower on this engine?)
I run a Holly carb, and through transom exhaust.
Any suggestions on a combination that will work is appreciated. Thanks

[GofastRacer]

I'm sure you have peanut port heads, get a set of 049's and it will wake it up big time!..

[H20MOFO]

Iv'e Never Owned One. But It Sounds Like Your A Good Pro-charger (or Other Belt Driven Huffer)candidate? Thats There Claim To Fame Bolt On 50 Or What Ever Percent, With No Other Changes.