Wow! Thanks for the replies. There sure seems to be a wide mix of suggestions. I think I will just go with what comes next but I think for a street car I would be better off going with a 383 or 400 as a base and build from there.

I was in same situation as you. I needed to rebuild the original 383 in my RR and intended to build it up a little but keep it stock appearing.

Long story short I found a deal on a 440 and spent exactly the same as if I had rebuilt my 383.

I cleaned up the old 383 accessories (air cleaner, manifolds, etc) and put them on the 440. Even kept a 383 pie tin on it to fool the brand x guys.

I don't regret it for a second! Runs way better than the 383 and looks more original than the 383 when I bought it!

Most people cant tell an RB from a B anyway, even a Mopar eye has to look twice to be sure. A stroker kit from 440source is what, 1800 bucks? And you really should have the rods checked anyway, you can buy a 440 rebuild kit for like 600 and if your rods check out alright, you dont have to spend anything extra on machining. The 440 winds up cheaper than a stroker. Although a 451 will rev up quicker. I still say unless youre going for all out as much HP as you can get go with a 440. With stock rods parts wont be too much and 450 horse is easy.