65 A833 / 904 length difference?

Sorry to double post, but thought that this may be the better place to ask the question... have a stock 7.25" rear and 904 in my 65 valiant now... Was told by a member here (340Mopar) that when I install my early abody 8.75", I will need to shorten the driveshaft by 2.25". My question is will this driveshaft still work when I eventually install my 65 A833?
thanks!