Okie's after selling my beloved Datto 1200's to pay for a family lawyer I now have picked up a b310 sunny coupe. Its auto with a a12 that has a head gasket problem. I do have an oval port head that's been reco'd with Stewart Wilkins double valve springs and a couple of n1 r32 gtr turbos. I will only do a a12 turbo setup but was wondering what diff and brake upgrades I can do? I do have laying around the adapter and s13 disk setup for the b110 struts. Will they also fit the b310 struts?. Also want peoples thoughts and ideas on what I can do to this little heavy beast

Just drive it and enjoy it. The diff and brakes are already an upgrade over what a 1200 has.

The problem with the coupe is it's weight, & an auto really adds insult. You could turbo it, or with the standard crossmember go to an A14 or A15. As you seem to want to keep the A12, you can replace the gearbox with a 60L or 60A 5 speed, a 60L 4 speed, a Toyota 5 speed, or even try fitting a 4 speed auto from a Pintara. The diff can be upgraded to a H165 housing from a Stanza, or a H190 from a Gazelle, which needs some modifications to the mounts, or a Skyline Borg Warner diff, or even a HiLux diff. So I'd suggest turbo'ing the A12, leave the auto in it at the moment, & maybe leave the rear end alone. The H150 is pretty rugged & is worth a try. As for the brakes fitting, all you can do is try. I've got some VL calipers & U13 Pintara vented 253 mm discs I want to try on a strut, but it could be all wrong. A set of Stanza struts are the same length as the stock ones, 200B are shorter but have the larger spring perch, which can be removed & a smaller perch fitted, or threaded sleeves. Use a Stanza ball joint to get wider track & negative camber. They look good with big wheels, too. Don't forget to put some photos in the album.