rotor conversions are pretty easy due to their physical size. the only troubleis getting the exhaust around the steering box, but if they can do it in R100s then they can do it a 120Y.

you have two options to mount it. either the 12A front mount timing cover setup or the 13B side mount style mounted to the intermediate plate. most people go with the front mount style due to the side engine mounts getting in the way of the exhaust. if you can geta hold of the mounts and bracket of a wrecked RX7 then you're pretty much there. you can either weld or bolt them to your front chassis rails - i choose bolting personally because you can never guarantee the quality of someone else's welding. conrod bolts or old L series head studs are good for this.

the gearbox looks huge (and is) but remember the low eccentric shaft height of the rotary will situate the gearbox lower than a piston box of the equivelant size. you'll only need a little "minor" relieving with a hammer to make it fit.

the gearbox xmember will be a custom jobbie - but some 6.0mm angle should see you there. tailshaft will need shortening too.

you'll also need a rotary radiator and oil cooler. the RX4 rad is the best, but an RX7 one is just fine. and steer clear of series 3 RX7 oil coolers. they're not worth their weight in copper - they absolutely SUCK.

now, if you have trouble with sump dramas, you can swap in a 180B crossmember as the member is reversed from the 120Y one. i can't for the life of me remember if you need one for only the 12A or 13B turbo - it's been aaaaages since ive been involved in a rotor conversion but i'm pretty sure it's the 12A. it's not hard to bolt in a 180B crossmember - ask Team_dat or L18_B110. if you do use the 180B xmember, you'll need to swap the struts from left-to-right and from right-to-left though as the calipers foul on the larger 180B steering arms.

use stanza struts and girlock calipers while you're there too, the 120Y brakes have a pad area the size of my thumbnail - and the H190 should be fine for the application.

power wise with a std 12A, all you need is a downdraft weber and a good exhaust and you'll have 180 flywheel HP on tap. open it up and port it and you could see just on 300hp with a peripheral port. i have a few rotor combos up my sleeve,s o if you're after a specific combo, just let me know.

happy rotoring!