would like info on 343 power up thanks

G'day Earthworm sorry mate for the delay on the info....so here goes..

631B 13G2596-4609 with forged body fuel pump

Full load speed - 1900 rpm
High idle - 2200 rpm
HP - 400 (with fan)
425 ( without fan)
static rack setting - 0.290"
turbo assem - 3S1412
or 1S9161
or 9M2423
Boost presure - 38.5" hg ( at stall )
Torque spring - 3L0756 (0.029")
spacers - 6F0353 (0.049")
5M1886(0.022")

631B 13G4610- up with compact pump

Full load speed - 1900rpm
High idle -2200 rpm
HP - 400 (with fan)
425 (without fan)
Static rack setting - 0.080"
Turbo assem - 8S6473
Boost presure - 44" hg (at full load)
Torque spring - 9S9003 (0.012")
spacers - 2S7380 (0.032")
9L9347 (0.020")
9L3626 ( 0.016")
9L3626 (0.016")

The 631C's were bumped up to 425 HP with aftercooling . ( I think )

Hope this helps

Cheers djcat