Engine help

[au03z71]

I'm going back and forth here. I could possibly get my hands on a 72 Cheyenne as early as tomorrow. I posted pics of it last week... Anyway:

I was looking to keep the original block and stroke it to a 383 just to have a matching numbers truck. Now, I'm hearing that the old 2 piece seal motors are nothing short of crap and it would be better to either build a newer motor or just fork out the grip for a turnkey due to being able to have a roller cam, longevity, etc...

So, for originality sake (or lack thereof), should I beef up the old school motor, or look for some new iron to throw under the hood? Also, what value, if any, would be added by keeping the original motor?

Thanks again