I have a friend who needs a 70 style 318 ballencer
and I found in my pile of stuff a 440(68 style) one.
I know I am getting old but I thought we interchanged these back in the day. am I right or just
hoping it will work.

Thanks in advance. Ron...

The timing marks are in a different spot.

He could find exact TDC then make a white paint mark across it to match the timing tab, if it is 90/180/270 deg off just put the timing light on the right plug wire

Hey Ron, if either one of these are the right style...you can have it if you wanted to come up and grab it...

70s style as in poly engine or LA 318 engines?

318s are internal balance 273 318poly LA318/340 interchange balancer.

EXTERNAL balance LA360/B400/RB external balance and cast crank 440 interchange ** 440 bullet nose damper says cast crank 440 ONLY. ( I run a weighted 400 TC with my 440 cast crank only damper)

I got a replacement damper that is internal balance but has a bolt on weight for a 360 and another weight for cast crank 440 only.

IIRC there may be a external 340 crank??

I have a couple good 318 dampers that are early 80s to mid 80s you can have as well if needed. they need a home other than scrap yard.

you talking the early LA 318 with cast iron water pump with driver side inlet?

those would have the timing mark in the wrong spot when mixed with the alum wp/t-covers.

spotting the difference would be crank key way and timing mark location on damper ring.

a later model damper will fit and work just hard to see timing marks with a light.

thanks guys for the feedback.
what he is trying to do is put a 1970 style timing cover and water pump on to a 67 318.
going from the cast iron water pump to the alum style one
and the lower outlet to the opposite side.

looks like we should just remark the old ballencer and call it good.
thanks again guys. Ron...

Agreed, we sure missed KISS on this! Your cast in marks will be on the dr side, as you know just find/set the dampener to exact TDC & paint a white mark across it at zero on the tab on the DR side. wouldnt hurt while you have the paint out is to make a few extra marks on the dampener like for 10-15-20-35. (1) degree is .0632683" & measure them out a strip of paper with your calipers & use it as a flexible ruler around the circumference.

The one pictured on the right is correct, thos bottom one showing the backside, see the differences on the rear side?

Another thing he will have issues with is pulley alignment. You have to use the pulley's that came with a cast water pump and the pulley's that came on an aluminum pump exclusively or you will have belt alignment issues.

he has all the 70 and up stuff,
pulleys and alt mounts and belt...

Yes , BUT the right one is drilled a lot for balance. If a 318 is internal balance that balancer would need to be checked first before using it .

OK, here goes for SFT:
'70s Poly doesn't compute, the last Poly was something like 1968 in Canada, 1967 here in the States.

For the unschooled, newbies, etc:

All 273s are neutral balanced even though their pistons weighed much less than 318 pistons, and the 318 pistons and rods were used in the 273. Chrysler engineers made up the weight different with special heavy wall pins for the 273s.

All 318s, from the early A Poly to the post-LA 5.2 Mag, are neutral balanced. Forged crank 340s are neutral balanced.

Cast crank 340s have their own factory imbalance and don't interchange with anything.

The cast crank 383s, 400s and 440s all used the same factory imbalance and can be interchanged even though they have the warning cast in to "use with cast crank XXX engine only".

440 engines with the 908 rods used a different amount of factory imbalance and have their own specific damper, although the issue is confused because later on some heavy rod engines used neutral balance dampers, IIRC.

The 360s had a much different amount of factory imbalance and are useful only on 360s.

5.9 Mags have their own imbalance and it's less than the LA 360. I expect that dampers should not interchange between the two. 5.9 Mags with automatic transmissions used an imbalanced flexplate and neutral balanced converter. This makes life easier.

R.

PS: I don't think the damper in the photo has an unusual amount of drilling on it. The amount of metal lost is much less than that for a 360, for example. I have seen that drilling on many 318s.