I think my a-833 is an overdrive unit

that is great but i am in central Illinois, I got this for my drag car so i don't care about overdrive
I am willing to wheel and deal if somebody wants to otherwise i am going to change out the guts
Is it worth more becouse it is an iron unit?

Well first off it's only worth what people are prepared to pay right. That said there's been a move lately to OD trannys like 5 speeds and units like gear vendors so guys can highway cruise a little easier without sucking so much gas. Put the unit up for trade/sale here and bigblockdart.com and Kijiji and see if you get any bites. Up here I've seen OD units going for anywhere from $600 to $800, fully rebuilt, and because they're getting rare.