My 323 is a lil monster. Was in a 4spd 4door valiant. just as capable as a 340-360. The thing to do is use the magnum head swap. In effect results are similar to a vortec swap in terms of requirement for change. Use the GM beehive springs from a 3100 series 2 v6 engine. Mopar always had poor heads , but great oiling and rod internal provisions.
318 over 30
4 speed 833
very good cam 340 mp2783 340 cam 290hp/same as 360 lil red express
Edelbrock streetmaster 0-4500 intake
1.88/1.60 heads milled .060
GMHEI 4 pin module conversion.
Last edited by spinn; 07-25-2011 at 07:54 PM.