Here is my problem: I built a 1974 350 and put it in my 88 camaro that had a stock 305. I used the timing cover from the '74 but I had to use the harmonic balancer from the '88. The problem is that the timing mark on the '88 timing cover is in a different spot then the '74. I can't figure out where exactly my TDC is. Does any one know how many degrees these two marks are apart?

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1988 Camaro Sport Coupe: Orignally: 305 TBI 700r4
Now: 1974 350CI, 2bolt,.030 over, Badger Flat Head Pistons w/ valve relief, Melling high performance street cam, GM Cast Vortec Heads, Edelbrock RPM Air Gap Intake, Edelbrock 600cfm w/ electric choke, GM HEI w/ vacuum advance, Weiand Low Profile Air Cleaner, Mallory 5 port Fuel Pressure Regulator, Mr. Gasket Throttle Cable Bracket, Corvette Shift Servo, 16" IROC Wheels, Every thing else is STOCK

 

There was a big debate over exactly how many degrees it was....

The only correct and accurate way to get it right is too buy the correct balancer.

This way you know for sure that the balancer outer ring hasn't slipped.

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R
and 2 POS commuters...

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