small block crank

[Rabid Transit Garage]

New to FABO and I thought I would ask a question I believe I know the answer to but would like more input. I have a 340 and went to install it in front of a 727 and the torque converter hub would not fit in the pilot of the crank. I believe the crank is from a 273 but I have not found any information to confirm this. Any info would be appreciated.




1974 Dart Sport / 318
1967 Dart Gt / 340
1967 Barracuda /400

 

[Locomotion]

Yes, it is likely a 273 crank. Early 273's had a smaller register for the converter hub. I found out the hard was a long time ago. I don't recall what year around the mid-60's they went to the common, larger size.

I had that issue a long time ago. A friend ground it out with a die grinder because I was at work and had a race to go to the next day. It may not have been the "right" way to do it, but he was very careful, grinding it out bit-by-bit, and I don't recall any issues.

The alternative is disassembly for a visit to a machine shop or another crank, or a converter with a small snout.

 

[junior]

Check to make sure that there is no pilot bearing in the crank from a manual this happened to me recently. frustrated the hell out of me untill I figured it out

 

[1wild&crazyguy]

the hub is thick and since it has to hold the same od to match the id of a flywheel, just have it opened up-take it to a machine shop.

 

[66fs]

Yes, it is likely a 273 crank. Early 273's had a smaller register for the converter hub. I found out the hard was a long time ago. I don't recall what year around the mid-60's they went to the common, larger size.

I had that issue a long time ago. A friend ground it out with a die grinder because I was at work and had a race to go to the next day. It may not have been the "right" way to do it, but he was very careful, grinding it out bit-by-bit, and I don't recall any issues.

The alternative is disassembly for a visit to a machine shop or another crank, or a converter with a small snout.

I think the 1967 was the last year for the small torque convertor register hole.

 

[fishy68]

I think the 1967 was the last year for the small torque convertor register hole.

That's right. In 68 they went to the bigger converter register hub. If the crank is a 67 or older that's your problem.