As I recall mine had 10 rating on the head of the bolts.
The book says a "7".
Dang drove off without the book.

It will take like 3, 12mm-1.25
and 3, 10mm-1.25
I don't know if you'll use those brakets that run along the bottom of engine that tie to the bellhousing for the engine mount. Those are 8 and 10mm .
Get you some good "old" bolts at NAPA that have dust on them.
Look in transmission section of FSM. Picture shows the bolts going thru the bellhousing and gives lengths and diameter, but not pitch on bolts.

dave h.
'89 Raider V6 5spd;Aisin Hubs;; Gen2 LS: frt. brakes, rear coils;U.C.arms;R.trailing arms;idler arm; rear LSD axle w.disc brakes ;2 battery system for Dog's fan; relocated ECU; custom bumpers;J.Baker receiver;Conferr roofrack; t-bar crank.