Does this 17"/18"setup seem like it will work?

225's looks net with a 8" wide rim. 235 might be a compromise between the two.

A-body 8-3/4 with BBP OEM Drums and proper axles will be about 1/8" wider per side. I think OE BBP is ~2.5" brake offset and SBP is ~2-3/8". Add another 1/8" per side for BBP rear discs like Dr Diff sells.

Front will widen ~3/8" per side with OE BBP Discs.
Thanks for the info! I think a 235 might be about right. I really just don't think I want to go with a 225