Wilkes340
Active Member
A friend of mine is building a 1969 340 but he's using a 1972 cast crank and vibration damper. He ask me which TCC he should use 67-69 or 70 and up i told i would have to think about it,which one would be correct?
Not really, you can still run the newer cover and find the older bolt on timing tab or make your own Then install timing tape. You will need the older water pump. Exactly what I'm running. You can actually run the old pump with the newer cover and dampener, just makes the timing marks harder to see but not impossible. Harder if it has power steering, but again not impossible.70 up will have the timing marks correct to the 72 damper, but now he will have to swap out the radiator. You always should check TDC. I have seen them very far out, some more than 10 degrees.
A friend of mine is building a 1969 340 but he's using a 1972 cast crank and vibration damper. He ask me which TCC he should use 67-69 or 70 and up i told i would have to think about it,which one would be correct?
Thank you for the knowledge.He is using a cast crank so he will have to use the 72 balancer or equivalent with a weight
so to use the 68 69 cover and w/p he will just have to find TDC and mark the balancer on the right side, Problem solved!
Question...
Is the snout of a 72 crank any different than an earlier one? (ie any reason the harmonic balancer from earlier 67-69 wont fit on 72 up crank?)
For the record, my 67 273 currently has a late cover with timing marks on the drivers side and the metal timing tab from the OE cover bolted to the pass side. everything else is OE 67 273 and works fine. (not sure if 340 is the same dimensionally)
Just a thought... if the timing marks are 90 deg off couldn't you use the pass side tin timing plate and use another cylinder that fires 90deg later as the reference (knowing that for TDC of #1 would only be correct on the drivers side cast marker.)The snout is the same, but the keyway is 90° off of the timing marks from the earlier 67 - 69 damper...
That would be a different story then!I don't think it is exactly 90 deg.
run whatever he wants, just remark the TDC on the balancer.A friend of mine is building a 1969 340 but he's using a 1972 cast crank and vibration damper. He ask me which TCC he should use 67-69 or 70 and up i told i would have to think about it,which one would be correct?
Not really, you can still run the newer cover and find the older bolt on timing tab or make your own Then install timing tape. You will need the older water pump. Exactly what I'm running. You can actually run the old pump with the newer cover and dampener, just makes the timing marks harder to see but not impossible. Harder if it has power steering, but again not impossible.