440 vs. stroker 408 build?

I can get a 1977 440 with a 727 for 190 bucks, it came out of a totalled imperial, it has been outside in the rain since last summer, but was never rebuilt, and it was running when the car was wrecked, so, short of disassembling the motor in the yard where it is at, I don't know if it is a good deal. it has rust, obviously, but would this be a decent deal? the guy has another one as well, but of unknown origin or history, they are at a wrecking yard. I thought that this might be a cost effective way to get the power and torque I want without incurring the cost of building a stroker... fitting it in a swinger will not be easy, but with a hughes muscle car cam and a dual plain, a bore/flux job, 9:1's, and a valve job I should be able to fry the rubber right off those steelie's, right? yet perfectly streetable for alot less than a stroker build, I think, and 440's weigh in the same approx as a 383, right? so the pro's and con's are best gleaned from those who know...can anyone help me here? I want to put it in a 74 swinger. rb motor swap mounts cost same as la ones do, so I can't think of a good reason why an rb conversion wouldn't be a less expensive and very effective way to find four hundred horses under the hood of my dart!