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| | | | Joined: Nov 2009 Posts: 2 New Guy | | New Guy Joined: Nov 2009 Posts: 2 | i have a 55 chevy 4400 with the inline 6 in it, and was hoping to put a 305 v8 in it. will it bolt to my original 4 speed. | | | | | Joined: Apr 2005 Posts: 187 Shop Shark | | Shop Shark Joined: Apr 2005 Posts: 187 | It will with the right bellhousing.You will also need the front mounts.
_____________ Floyd If we choose being kind over being right,we will be right every time. Knowledge is a poor substitute for experience. Remember what is precious to another, may not be to you, but it is precious nonetheless. 1948 Chevy 2-Ton | | | | | Joined: Nov 2009 Posts: 2 New Guy | | New Guy Joined: Nov 2009 Posts: 2 | any idea what they call this 4 sp tranny | | | | | Joined: Jul 2001 Posts: 3,887 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2001 Posts: 3,887 | any idea what they call this 4 sp tranny ... you'll need an aftrmarket engine mount crossmember and a fan shroud, otherwise it's a pretty straightforward swap Bill | | | | | Joined: Mar 2004 Posts: 6,233 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,233 | The original 4-speeds are known as the "SM420" with a Granny Gear first gear and 1:1 4th gear ratio, they are almost bullet proof. The Small Block Chevy (SBC) V8 engine was optional in 1955, so your 305 SBC will bolt in. It won't give you any real speed inprovement (3000 RPM is still 3000 RPM regardless of what engine is turning it), but will give you more power. You will also need a deep fan shroud. I have a 1956 8400 that started life with the 265 V8 and now has a 350 SBC V8. Mike B  | | | | | Joined: Apr 2010 Posts: 474 Shop Shark | | Shop Shark Joined: Apr 2010 Posts: 474 | Try this link they have great info and parts if you can't find old ones to use. www.advanceadapters.com | | | | | Joined: Jan 2011 Posts: 12 New Guy | | New Guy Joined: Jan 2011 Posts: 12 | I'm actually looking at doing the same thing with my '69 C50, only a '69 307 instead of a 350. It has an oil bath 350 right now, but it's VERY tired and the 307 doesn't have 2k miles on the rebuild w/327 heads and a 4bbl. I'm hoping that it'll bolt up to the SM420 that's in it currently.
Bryan
Equal opportunity truck employer
2x - Ford Superduties
'92 Toyota
'05 Silverado 1500
'69 C50 "Grumpy" 350/SM420 flatbed
| | | | | Joined: Oct 2010 Posts: 11 New Guy | | New Guy Joined: Oct 2010 Posts: 11 | thats what I am doing in my 55 1.5T berad truck.. originally had a 261 and the same 4 speed as mentioned above.. you need the 55-64 bell housing as they went to a bigger bearing retainer in 65. the flywheel wont work.. need one of them too.. also you can run your original friction disc. but depending on which flywheel you may need to get a different preassure plate. the fork should swap over as well..
Huh?
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