i went and took a look. the bolt patterns would fit (one is chevy, the other is unibell) but the tail is different on both (6", 9"), the kickdown cable are in different places (thus my current one is too short) and i'd need a new crossmember; and to top it off, the new one has the shifter snipped off at the case.
at least the input shaft has 27 splines on both, for what little comfort that is.
i'll just get the blown one rebuilt. faster turnaround and only slightly more expensive (if even that considering all the work involved) than buying all the parts id need for the "new" one
thanks for the help though, that gave me a good idea on what to look for