[tnewland]

As far as I know, when it comes to automotive and truck batteries, it doesn't matter what the brand is, group size dimensions are, in effect, carved in stone. A 22F Delco is going to be dimensionally identical to a 22F Autolite. And the post positions are going to be identical. There has to be some standardization or there might be chaos simply trying to find a flashlight battery!
Search for BCI Battery Group numbers. Jegs offers an easy to read chart which includes all the dimensions.
Dan, if you're not too fussy about appearance, you can find a modern battery that does the job and will be a lot easier to install in your "daily driver". It sounds like, over the years, that basic group 24 battery that you installed easily in 1985 has grown while picking up "suffixes" that account for the size increase and commensurate difficulty.