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| | | | Joined: Jun 2008 Posts: 25 New Guy | | New Guy Joined: Jun 2008 Posts: 25 | i put a srncro 4 speed tranie in my 1946 gmc 1.5. ton.with altered bell houseing from jim carter. had to trim cross member and shorten drive linei did seem to run out of adjustment on clutch.
now im pulling out motor,no power.
im puting in a 270 gmc:1958.looks like its going to work.
is there any problems i should be aware of,
almost the same question as jammer.
thanks you guys are great | | | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | Assuming you are removing the original motor from your '46 there should be few issues dropping the 270 in place. You many need to change the front mount on the 270 to the earlier type, but externally there are few differences and those are mostly in the accessories.
I'm not an expert on cranks and flywheels for these things and can't speak to what you may find there.
I have a later 270 in an earlier truck and my biggest complaint is the BC GMC logo on the valve cover. Because I don't have the earlier oil fill tube I can't easily swap to the early GMC logo. Some day I'll solve that problem.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | | | | Joined: Jan 2008 Posts: 4,961 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,961 | The 46 front motor mount can be used on the 58 engine. In fact a Chev front motor mount/cam cover will work too. Your flywheel is probably a 4 bolt on the 46 and a 6 bolt on the 58. The 58 will have the smaller teeth designed for the 12 volt starter. 6 bolt 6 volt flywheels are around, but are scarce and therefor expensive. I know a guy that puts 12 volt field coils in a 6 volt and could probably do it the other way around. Do you have a starter on the 58 engine. It will be a different tooth count than the 46. | | |
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