[metalhead140]

Rotary engines bolt straight in using Rx3 mounts.

Front and rear suspension are already quite good, new bushes shocks and some lowered springs and it will handle quite well. Beyond that, a stiffer front swaybar with shorter legs to pull the control arm forward for some castor will make a big difference, as will a little negative camber, either from a strut top or redrilling the crossmember to push the control arm further out.

The front struts can be directly swapped for rx3/808 struts for greater brake/shock/spring compatability. Rx4/929 struts can also be fitted utilising the 323 strut top. First gen rx7 struts can be fitted (which have ventilated and larger disc brakes) also by swapping the strut top, but will give you positive camber and the car will handle like crap.

The standard 323 brakes are crap and will definitely need upgrading. The front struts can be changed as above. Rwd 626 drums are a larger bolt on upgrade for the rear.

The diff in the back will last reasonably well behind a stock n/a rotary (I had one that lasted several years behind a mild port carby 12a without missing a beat) but much more power or abuse and they will break axles and centres on a regular basis. In Australia many people fit hilux diffs due to the abundance of high ratio rotary friendly centers available. They also have a lot of aftermarket support with stornger axles and centres, and are very strong.

Anything more you need to know, just ask. I am currently building up a '77 rwd 323 with 12at, hilux diff, and heavily modded suspension for street and circuit use.