transmission options and questions

As others's have pointed out.

The five speed automatics whether 545 or NAG require major floor surgery including altering the cross member and basically rebuilding the transmission tunnel.

A 518 requires mods to the cross member but has the benefit of an OD. Does require a specific flex plate or a .060 spacer.

727 904 will bolt right up, but requires either a specific flex plate or a .060 spacer.

T-56 requires major floor surgery including a new cross member and tunnel modification, shifter not located in factory location.

TK600 require some floor surgery or REALLY bad U-Joint angles. Shifter not located in factory location

T-5 would probably fit but the 400 ft. lbs. of torque will probably destroy the T-5 pretty quick, even the world class ones are only rated to about 300 ft. lbs.

833 bolts right up, need to add pilot bushing to crank.

Passon Performance 5 Speed. Pack a lunch, they are now shipping but it could be a year before you'll get one. The good news though is not one bad word about build quality or durability.

You can also add a Gear Vendors OD to either a 727 or 833, a small dimple may be required in the transmission / drive shaft tunnel.

Regards,

Joe Dokes