Budget 360 build in heavy car- Which cam?

For a mostly street cruiser at that weight, first cam (-08) is my choice. If you do go with a 3000+ converter just be sure to get one that stays tight when not wide-open. I think a ~2500 RPM stall would be sufficient but newer custom converters can stall higher and still be tight at part throttle. If the car will see any freeway cruising above 65 mph I would definitely stick with 3.23 or 3.0x gears. The smaller cam will work fine with stock rockers and is probably better for your stock-ish compression ratio which I doubt will be much higher than 8.5:1 with the thin head gaskets and light milling of the heads.

For lifters I'd hit up one of the smaller cam companies like Schneider or Delta Cam and get some from them, all of the big-name outfits get their lifters from the same manufacturer and these days it's a crapshoot with quality; not uncommon to get one or multiple in a set that don't have the faces ground with the correct radius or too loose of tolerances in the hydraulic plungers and end up with a wiped cam and/or collapsed lifters.