Im, throwing new seals on an 86 13b with a blown coolant seal can i put a 12 a front cover on the 13b block and a 12a dizzy? then a big carb/intake clutch and mate it up to a 12a tranny? anythiong else i would need or is this possible

 

I think you will need the SE oil pan or the one that RB sales.

 

does anybody else know if i will need a different oil pan?

 

Hit the FAQ and you will find info an a TII into a first gen, should be almost what you are doing.

 

You can use dry sump, or re-shape other 13B oil pans to clear the steering.

 

yes, you need a gsle oil pan, then hammer flat the front bracket the motor mounts attach to.

 

It is the cross member you must clear . . .

 

Personally I would not recommend flattening the bracket, but whatever...

 

If it is a 12A RX-7 chassis, the crossmember will be in front of the oil pan, any oil pan... Are you referring to a front-mount engine?

 

It's easier to slot the holes or better yet just buy a 13B bracket.

 

84, 1st gen, FB . . .

cross member is not in front of the engine.

?yea dont flaten the bracket buy a new one? Ha, ha ! ! !

save your money, their are no ill effects from flating it.

 

We must not be on the same wavelength, or one of us is cross-eyed. The way I see it, the crossmember is in front of the engine.

I measured the angles and dimensions of the bracket, and even made a cardboard and CAD model. Flattening the bracket will not result in the slots lining up exactly 20mm rearward in the same plane. Not saying it won't work, just that it is not the exactly correct geometry. If you flattened your bracket and haven't had any ill effects, congratulations. It does not cost anything but some welding gas and scrap stock to lengthen the mount; the holes will be in the exact positions and the mount can be used interchangeably with either a 12A or 13B engine.

 

I dont understand why i would need a different oil pan im using the 12a tranny stock 13 short block with carb but with a 12a front housing so that it mounts at the front and bolts right in so the engine would be behind the crossmemeber and it is a 12a chassis fb

 

If you have the car and both oil pans, you should be able to hold them in the position and see for yourself. The 12A oil pan dips down between the cross member and the steering. The re-shaping modification I mentioned was necessary to make the 13B pan fit in the same space (simply heat the pan up with a torch and work it into shape with a hammer and dolly).