What engine do I have?

[ocezam]

I'm a long time lurker, but I think I may never have posted before.

I recently bought a '32 Ford roadster. SBC/TH350 combo. I need to find out what engine is in this so I can decide where to go with hop up parts. I assume this started life as a simple 290HP 350 ci engine, but that's a blind assumption. It's got a Victor Jr intake manifold with what I believe to be a 650 Holly 4bbl. Block hugger headers, 2 inch dual exhaust with Flowmasters. No crossover pipe. HEI ignition.

That's probably more intake manifold than I'd have picked, but I own it and it looks great. The motor feels and sounds fairly low compression to me, and the cam sounds stock, but again that's just a guess. The car runs fairly well, but any motor can push a 2000 lb car pretty well. I want to hot rod the engine but I need to know what I'm starting with.

Should I look for serial numbers? Do a compression test? Where do I start?

Thanks in advance...