Gear box to Engine

Hello all, My winter project was to pull engine and gearbox to replace floor rails. In doing so I figure to replace some items such as the gearbox mounting bushing and bolts that attach the gearbox and engine. As far as the bolts go I ordered from Moss and they only listed one part number. When I received the blots they were to short for my 62 MGA MKII. It looks like the bosses on my gearbox are to thick. Has any one else experience this with there gearbox? see attached pics
Thanks

another pic

one more of the gearbox

Yes, absolutely normal. The flange on the MK-II is thicker, and this later on carries over to the MGB. Moss needs to update their catalog with different part number for the longer bolts for the MGA 1600-MK-II type gearbox.

See SPL here: http://mgaguru.com/mgtech/books/spl_1600.htm
Gearbox section here: http://mgaguru.com/mgtech/books/spl/spl_1600_f.pdf

And the fine print says:
Bolt - gearbox to mounting plate -- HBZ0510 (7) 5/16-24-UNF x 1-1/4 zinc
- - - Finishing (e)16GC/114721 except 4721 to 4729, 4732, 4734, 4740 to 4747

Bolt - gearbox to mounting plate -- HBZ0510 (1)
Bolt - gearbox to mounting plate -- HBZ0515 (2)
Bolt - gearbox to mounting plate -- HBZ0525 (4)
- - - Commencing (e)16GC/4748 and 4722, 4725, 4730, 4731, 4733, 4735 to 4739

Nut - bolt -- FNZ505 (7)
Washer - spring - nut -- LWZ305 (7)

BMC Fastiner Decode Booklet here:
http://mgaguru.com/mgtech/books/pdf/bmc_fast2.pdf
HBZ0510 = Hex Bolt Zinc 5/16-24-UNF x 1-1/4
HBZ0515 = Hex Bolt Zinc 5/16-24-UNF x 1-7/8 zinc
HBZ0520 = Hex Bolt Zinc 5/16-24-UNF x 2-1/2 zinc
FNZ505 = Flat Nut Zinc 5/16-14-UNF Ordinary UNF high tensile
LWZ305 = Lock Washer Zinc 5/16 heavy section helical spring

BG Would ordering the bolt kit for the 3 main MGB work? Thanks.

Thank you Barney for the info, I didn't think I had the only odd ball gearbox.

I would just get grade 5 bolts from the hardware store.

BA, -- I don't know. I don't have an SPL for MGB. Ditto Gary. Grade 5 bolts from hardware store or local auto parts store. Description my last post.