[njsteve]

No, the 72 HO carbs were jetted extremely lean from the factory, too lean in fact to get any real power, it seems. I just happened to actually hook up the wiring wrong on the TCS solenoid, which ended up producing more power than stock to begin with by giving vacuum advance in 1st, 2nd, and 3rd gears. Sort of like going directly to step 3 and skipping steps 1 and 2 of disconnecting the TCS and rerouting the vacuum advance hoses, when looking to improve performance.

The richer secondary rods helped the WOT performance. The guys over at the Pontiac site who are very familiar with the low compressions 71 and 72 HO engines are passing along most of their little secrets. I have a couple pairs of jets and primary rods on their way, for me to experiment with.

Each little tuning trick seems to be helping the performance measurably. By next spring it should be running a bit strong(er). [img]<<GRAEMLIN_URL>>/burnout.gif[/img]