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Old 02-18-2005, 12:25 AM   #1
bpmcgee
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History lesson on 283 and 235 please

Hi,

The '60 for which I'm planning a frame-up restoration has a trademaster ('60 or so 283) in it. From the factory, it came with a 235.

I have 3 options in engine rebuilding -- Find a 235, use the 283, or use the '70s era high-nickel 350 block that I have. I'm curious, first, what the differences would be between the 283 and the 350 (I think a different rear seal at least?) and the idiosyncracies of the 235 -- I don't know much about the inline 6's.

Thanks!

Brian
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Old 02-18-2005, 11:25 AM   #2
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Brian, there are many differences between the 283 and 350. The main difference of course would be the 283 has a smaller bore and shorter stroke, and also has smaller rod and main bearings. Most 283's had higher compression than a 350(except for high performance 350's). 350 heads should have hardened valve seats for unleaded fuel. They're both good engines, both easy to work on and parts cost about the same for both. The 283 would be more original but the 350 would give you more power, given both motors are stock of course. It really comes down to what you like and what you want. As for the old 235, they're good engines too, but if you get one be sure to get the bell housing, flywheel and engine mounts to go with it. They're all different from the V8. Some of the car 235's had hydraulic lifters, but other than that they were all pretty much the same. I don't know how original you're trying to stay, but if it were me I'd probably stay with the V8 since you're already set up for it' but that's all up to you. Best of luck.

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Old 02-18-2005, 03:28 PM   #3
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I'm getting ready to do this swap myself, and am pulling the 235 & 3 speed for a fresh rebuilt 350, and backing it with a short tail th350 trans.
The 235 & 283 front engine mounts are also different. The 235's front engine mount is part of a plate between the timing cover & engine block. And the 283's mounted onto the 2 bolt holes in the lower part of the front of the engine block. The positions of where the engine mounts bolt at are the 235's is the plate in front of the saddle, and in the middle of the saddle is 2 bolt holes, this is where the 283 mounts to the frame.
If you do go with a automatic trans, the crossmember where the bellhousing mounts to will have to be removed for the trans swap. The 235 radiator will probably need to be upgraded for the temp difference, since the 283 & 350's get hotter than a 235.
David
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Old 02-18-2005, 04:02 PM   #4
oldtrucksdave
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Brian, I would go with the 350, rebuild parts are cheaper than those for a 283(about 150.00 for a complete kit from northern auto parts), plus considerig the weight of these trucks the added cubic inches will make for easier building for torque. You can also add older valve covers and accessories to make it look original. Have fun.
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Old 02-18-2005, 11:27 PM   #5
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go 283!!!
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Old 02-19-2005, 12:57 AM   #6
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my pops has a 65 k10 with a 283, supposedly out of a 58 vette.. with the sm420, and 3.73 with posi, it will haul... LITERALLY. he uses to haul 2.5tons of water weekly.. it depends on what you plan on doing with your truck.. 350s are normal... 283s arent so normal,... i would go with a mild 283... but its your truck...your money...
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Old 02-19-2005, 03:40 AM   #7
Demmit_Hemmit's 65
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I Had A 283 In A 67 Chevelle Malibu When I Was In High School..........graduated In 72..................same Year As The 340 Dusters Came Out..........................sure Was Sad To See Them After I Beat Them In The 1/4 Mile........................go For The 283..................just Imo..................hemmit..............ps........still Have The Origional Numbers Matching 283 From My 65 Suburban In My Avatar................hemmit
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Old 02-19-2005, 12:19 PM   #8
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im rebuilding 1965 283 thats go into the orignal 1965 c10 costs a lot but it's a 283!!!
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Old 02-19-2005, 05:37 PM   #9
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inline six info:

http://www.stovebolt.com

http://www.inliners.org
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Old 03-05-2005, 05:15 AM   #10
rmoorhead
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60 0ver

Quote:
Originally Posted by bpmcgee
Hi,

The '60 for which I'm planning a frame-up restoration has a trademaster ('60 or so 283) in it. From the factory, it came with a 235.

I have 3 options in engine rebuilding -- Find a 235, use the 283, or use the '70s era high-nickel 350 block that I have. I'm curious, first, what the differences would be between the 283 and the 350 (I think a different rear seal at least?) and the idiosyncracies of the 235 -- I don't know much about the inline 6's.

Thanks!

Brian
My 82 sierra classic came with a 6.2 diesel and was a lemon. Swapped in a 305 by 90 and it was a little better lemon. I found and old 283 from 1962 bored it to .60 over and never looked back. Been replacing transmission eversince.
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Old 03-06-2005, 12:39 AM   #11
Brainchild
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283's are tough as nails.They are the enegizer bunnies of GM engines.Hard to tear one up,IMO.Plus not many people have one,everyones got a 350.I'd go with the 283
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