or you'll have to fab a trans mount if this is a manual at least. engines that come with an auto have a different crank end than those that come with manuals if you're not changing transmissions. the front wiring harness will need to be changed too. i would suggest you get service manuals for both cars.

'97 1.8tqms A4: apr stage 1, Miltek exhaust, K&N, SB/OFE clutch, S4 liner, apr snubby, bilstien hd, , h-sports arb's,cpp rear down links, autospeed dts, racetec strut brace, ecs 2 pc. A8 front brakes,pbr/axxis deluxe pads, goodridge ss. brakelines suspension hardware , sports mats, sunglass holder,