To Me, that looks like a long-tail. The shifter appears to be too far behind the trans mount to be a short-tail A-body.
Some of your slanty clutch linkage will not fit the V8 stuff; like the Z-bar, the fork, the adjuster rod,the inboard z-bar anchor; and the slanty pedal ratio is different also from a V8.
You need the A-body short-tail trans for to put the shifter up through the factory floor hole. Your A-body cannot use the front shifter mount of a longtail, as it sits right in the cross-member. You could use the rear pad of a longtail with a fabricated adapter, but if you don't get it just right, the shiftrods will not fit.And your driveshaft will still be too long.
I would bite the bullet and buy a 4-speed right out of the gate. You can thank me later.
The A230 came in two flavors; slanty ratio, and all-others.IIRC the slanty had a deeper low, and a short 2-3. Whereas the V8 had progressive splits.
