Need some help from anyone who has already done this (I don't want to re-invent the wheel).
I have 2 1999 HP500's, carbed, and want to upgrade to 600 horsepower. I wound rather not go to blowers and am hoping to just upgrade the heads and cam. Anything more then about 620hp will require a drive upgrade, so I'm not interested in going any higher.
I have the Merc HP exhaust manifolds and Gil risers, so I would assume that exhaust is not an issue.
Dart intake and 800cfm (or 850) Holley's. Plenty of CFM and flow on the intake as well to handle the additional horsepower.
I have access to a dyno and will check the hp and torque curve on the current setup and build from there. Someone has to have already done this. If I have to, I will upgade the distributor and change the factor rev limiter so I can pull a few more rpm's but top out at around 5800.
I want to continue to run pump gas (89 octane) and keep the reliability factor. Does this sound doable? Thanks in advance for the help.