As above can't find this figure in any of the books I have . Bell housing to gearbox no problem. I'm thinking probably do the same although they are a smaller bolt .

Ive pulled plenty of engines apart where these bolts are not much more than finger tight and dont seem to have caused any problems. Just use a standard ring spanner and tighten with that. Using a long handle  and socket will possibly overtighten and stretch the bolts.  Probably should be in the region of 25 to 30 ftlbs.

Cheers Ron . Will finish off tonight. Test run tomorrow fingers crossed