FWIW- My buddy had a 308ci, motor with KB Hypers, stock 69 302 rods, crank, 85 302 block, R heads, R intake, XX-Trim (30psi of boost), Accel DFI tuned and it lived for a long, long time with lots of abuse...the tune was good. It actually finally squished the rods which was found when new rings and bearings were being put in.
Would I reccomend this, no way but it can be done.