350 casting 638 with mild crane cam and lifters along HEI dist Performer intake 750 dbl pump edle carb 1979 truck heads how much power would you guestimate it at?

That's a fun combination! It's tough to give a precise horsepower estimate without knowing the specifics of the cam (duration and lift are crucial), the exact 750 CFM Edelbrock carburetor (there are variations), and the condition of the engine and components. However, we can make a reasonable guess.

Considering the parts listed:

* 350 Small Block Chevy: A solid foundation.

* 1979 Truck Heads: These are generally considered less efficient than performance heads, limiting potential power.

* Mild Crane Cam and Lifters: This is the biggest variable. A "mild" cam could mean anything from 200-230 degrees of duration at .050" lift. This significantly impacts power output.

* Performer Intake: A good intake for a street-driven engine, providing decent flow.

* 750 CFM Edelbrock Double Pumper: Sufficient carb for a mildly modified 350.

Estimated Horsepower:

Assuming a relatively mild cam (around 210-220 degrees duration at .050" lift), I would guess the engine would produce somewhere in the 275-325 horsepower range at the flywheel. This is a broad range, and could be lower or (less likely) higher depending on the specifics mentioned above.

Factors Affecting Power:

* Compression Ratio: The compression ratio of your engine significantly impacts power. Higher compression generally means more power, but requires higher-octane fuel.

* Exhaust System: A restrictive exhaust system will rob horsepower.

* Ignition Timing: Proper ignition timing is critical for optimal performance.

* Engine Condition: A well-maintained engine will always produce more power than one that's neglected.

To get a more accurate estimate, you'd need to specify the camshaft's specifications and have the engine dyno-tested.