273 Numbers Matching car. Should I rebuild or swap engine?

I got really lucky on CL and it was complete carb to pan with all acc's for $350. The 360's are much easier to find and just as good. I will have to relearn how to drive it with this much power once I get all of the bugs worked out. It barely got out of it's own way before the resto and the only way it would spin the tires was in the rain lol.