I'll try posting a pic, but it's as it came home.  The '46 block has two cracks in it and after chasing other blocks, my '35 has a '51 flattie, I was offered an almost complete '62 292.  I've since acquired the B 4 bbl manifold and recently, a mustang t-5.  The request for dimensions was based on wanting the tanked block at the machine shop while I was working on the chassis, plugging holes and a minor Z out back.  A '46 front axle and split bones with an 8" rear under the A spring.  Oh, a sport coupe body will be on top, top and back window channels had been cut off, so may be a "Coupster" or we may try and figure out how to make a hardtop convertible, ie roll up windows and a folding top.  It's just a literal pile of sheetmetal waiting for the patch panels.
I agree a mock up is the way to go, but I'm still a bit short on the engine parts and trans adapter, so thought I'd ask first.  I tried, but the picture is too big.  As I go, I'll take progress pics at a smaller resolution to post.  I won't really be starting for a while, but will post when I do.  And keep asking a lot of questions in the meantime.
Thanks for your help and support!!
Richard