this is it sitting with a set of hedman 79080 2x D series headers. fit is great but I went to put the mini starter on the NV4500 hydro bell and was a no go due to #7 tube in the way.

the hedman 79170 4x4 header fit 72-93 4x4 chassis and #7 tube is moved for starter clearance/now fits a short LA starter or a mini starter. (you can R&R the mini with out header removal)

the hardest 2 things I see for you are the hydro clutch MC mounting bracket and drilling the 4 holes in the dimples your 82 has in that spot.

if you drilled a pilot hole in the firewall from inside dead center of the bracket while mounted a 2.5 hole saw would take the firewall out easy enough.