How sweet it is... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mplex2000 · 11-02-2005, 10:52 AM

Well today I decided to at least take off the diff cover so I could say that I started work on the axle (I have a locker and new set of 3.73's on the shelf).

Looky what I found! After I saw this, I decided to check my options sticker which, although barely readable, was still there. If you look hard, the third option on the left shows the rear end. Looks like this thing was built as a farm truck for sure

I also checked the block number to confirm what it was (and it IS a 350, whew). I kept thinking about a buddy of mine that bought a Chevelle when we were kids - the guy told him it was a 350 but we found out later it was a 307!

jsbgump · 11-02-2005, 11:09 AM

Sweet find looks like the one that I found and put under my 68.

matthufham · 11-02-2005, 11:21 AM

lucky you, i checked both of my parts trucks and got dissapointed.

Rod · 11-02-2005, 11:48 AM

Yep that looks like a 3.73 style posi not a locker to me. Lockers came in the 3/4 ton and 1 tons in this era. Good find..and from what I read on the sticker..the truck didnt come with a 350 as it would have been an option..but if you ran the numbers and it came up as a 350 then you got good stuff in that truck.

mplex2000 · 11-02-2005, 12:30 PM

Yeah the 350 is from a Camaro (or so I was told). According to Mortec it could be a 2 or 4 bolt main...think even though it's in good shape I'm going to pull it (it has a pretty good leak anyway) to throw in the new stroker crank and forged rods so it will be ready for the turbos.

Now I just have to see what gears these are, and decide if I'm still going locker or if I should keep the posi.

mplex2000 · 11-02-2005, 12:32 PM

BTW, Rod - how would I know what the original engine was (just for kicks)? According to the VIN is was a V8 but that's all I know. I do know it had a 3 on the tree, but it now has an auto with some kind of Olds floor shifter.

Sweet72 · 11-02-2005, 09:23 PM

Looks like the eaton posi unit (limited slip) in my 72 and by the numbers on the ring gear it is a 3.73:1 gear ratio.

11-02-2005, 10:52 AM	#1
mplex2000 Registered User Join Date: Jul 2005 Location: DFW Posts: 463	How sweet it is... Well today I decided to at least take off the diff cover so I could say that I started work on the axle (I have a locker and new set of 3.73's on the shelf). Looky what I found! After I saw this, I decided to check my options sticker which, although barely readable, was still there. If you look hard, the third option on the left shows the rear end. Looks like this thing was built as a farm truck for sure I also checked the block number to confirm what it was (and it IS a 350, whew). I kept thinking about a buddy of mine that bought a Chevelle when we were kids - the guy told him it was a 350 but we found out later it was a 307!

11-02-2005, 11:09 AM	#2
jsbgump Gone Fishing Join Date: Aug 2005 Location: Fort Worth, Texas 76135 Posts: 12,361	Re: How sweet it is... Sweet find looks like the one that I found and put under my 68. __________________ 68 Chevy Short Fleetside LSX Swap Under Way 3.73 posi 2.5/4 drop Frame of resto has been started 2022 Hyundai Tucson Limited 2019 Chevy Traverse Redline Edition Wifes Ride Build Thread http://67-72chevytrucks.com/vboard/s...=1#post3483616

11-02-2005, 11:21 AM	#3
matthufham Registered User Join Date: Feb 2005 Location: Carl Junction, Missouri Posts: 2,061	Re: How sweet it is... lucky you, i checked both of my parts trucks and got dissapointed.

11-02-2005, 11:48 AM	#4
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	Re: How sweet it is... Yep that looks like a 3.73 style posi not a locker to me. Lockers came in the 3/4 ton and 1 tons in this era. Good find..and from what I read on the sticker..the truck didnt come with a 350 as it would have been an option..but if you ran the numbers and it came up as a 350 then you got good stuff in that truck.

11-02-2005, 12:30 PM	#5
mplex2000 Registered User Join Date: Jul 2005 Location: DFW Posts: 463	Re: How sweet it is... Yeah the 350 is from a Camaro (or so I was told). According to Mortec it could be a 2 or 4 bolt main...think even though it's in good shape I'm going to pull it (it has a pretty good leak anyway) to throw in the new stroker crank and forged rods so it will be ready for the turbos. Now I just have to see what gears these are, and decide if I'm still going locker or if I should keep the posi.

11-02-2005, 12:32 PM	#6
mplex2000 Registered User Join Date: Jul 2005 Location: DFW Posts: 463	Re: How sweet it is... BTW, Rod - how would I know what the original engine was (just for kicks)? According to the VIN is was a V8 but that's all I know. I do know it had a 3 on the tree, but it now has an auto with some kind of Olds floor shifter.

11-02-2005, 09:23 PM	#7
Sweet72 Registered User Join Date: Nov 2003 Location: Alexandria, VA Posts: 1,534	Re: How sweet it is... Looks like the eaton posi unit (limited slip) in my 72 and by the numbers on the ring gear it is a 3.73:1 gear ratio. __________________ '72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction.



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