'79 440 Motorhome short block - Should I buy it?

I'm wanting to convert from the worn out 318 to a BB, but funds are tight. I have the BB K-member and other BB parts (heads, blocks, trans), but nothing that's even close to running.

I just saw on Craig's List a freshly rebuilt 440 short block for $250. I called the guy, and he still has it. He said it was rebuilt (0.30 over) about a year ago. The thing is, it's a '79 motorhome motor. Evidently he had other problems with the motorhome, and that's why the motor came back out shortly after the rebuild.

Could this short block make a good temporary motor? Is there anything particularly bad (or good) about a '79 440 motorhome short block? Does anyone know if it would have a cast or steel crank? Should I buy it?

Thanks for your help and advice.

John