I had a Gp A spec 1.9 rallycar, many many mods as you would imagine.

Roller bearing top mounts but with the extra strengthened top plates welded in, rose jointed gear linkage (good tip as the plastic bushed ones will break), Bilsteins all round (bit too hard on the back), rose jointed bottom arms, 309 beam with solid bushes (made 'em myself £3 each), solid engine mounts (homemade) etc etc.

Was a fun little car the only thing that lets them down is the electrics.

Im sure you will have fun with it Phil