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08-05-2007, 02:17 PM
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#1 |
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Registered User
Join Date: Jul 2007
Location: Colorado
Posts: 3
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New to the forum
Hello everybody. I found the site while looking for parts for my new to me Blazer. A little history, my first vehicle was a 71 GMC Stepside. lowered. All through high school I owned and worked on 67-72 trucks, the best looking body style hands down. I had a 72 blazer, 350 pro jection(for a while) 4speed, 33's. Sold it because I'm not very smart. My best truck was a 72 SWB that I bagged, roll pans, it was bad. Once again because I'm not smart I sold it years ago.
I bought a 72 blazer about a month ago. It needs the usual rocker and floor work but overall very solid. 15k on a goodwrench rebuilt 350. I'm planning on getting the body in decent shape, fabbing some bumpers, a couple inches of lift. It will mainly be a hunting and wheeling rig, maybe a plow. Now for the Questions. I need to know of a way tofigure out the gear ratio. If it's not what I'm looking for what year axles are compatible? It has a three on the tree manual trans. Is a sm 465 a direct swap? I found a single wall top but it's missing a side window. Are the double wall windows the same? I'm sure I'll need some help but I think I found the right place. Thanks Jared in CO |
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08-05-2007, 02:52 PM
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#2 |
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"1972 C5"
Join Date: Jul 2004
Location: SoCal
Posts: 729
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Re: New to the forum
Welcome from socal!
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08-05-2007, 03:44 PM
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#3 |
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Registered User
Join Date: Dec 2006
Location: Wesley Chapel, Florida
Posts: 1,113
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Re: New to the forum
Welcome you definatly came to the right place. Ways to figure out the gear ratio. 1. Pull the cover off the diff and find the ratio stamped on the ring gear. or 2. with the rear of the vehicle off the gound mark the drive shaft, turn the rear wheel 1 rotation and count the drive shaft revolutions.
Ex. If you turn the rear wheel 1 and the drive shaft turns 3x you have a 3.07 or 3.08 rear gears
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2004 Chevy Silverado 1500LS SWB 5.3L 2004 Corvette Z16 #770 Wish I had not sold 72 blazer |
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08-05-2007, 05:26 PM
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#4 |
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go cyclones
Join Date: Jun 2003
Location: Ames, IA
Posts: 1,883
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Re: New to the forum
Welcom to the board chi-town
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08-05-2007, 08:16 PM
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#5 |
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Member
 Join Date: Jan 2007
Location: Manchester, Iowa
Posts: 1,493
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Re: New to the forum
 from Iowa.
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08-05-2007, 08:33 PM
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#6 |
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Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,448
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Re: New to the forum
Welcome to the board from South Mississippi!
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"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal.  We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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08-05-2007, 09:13 PM
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#7 |
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The LuvShack Garage
Join Date: Jan 2004
Location: Maple Grove, TN (West Side)
Posts: 30,468
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Re: New to the forum
From West TN 
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Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T |
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08-05-2007, 09:13 PM
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#8 |
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It's the air up here
Join Date: Mar 2007
Location: Western Colorado
Posts: 710
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Re: New to the forum
Welcome from Western Colorado!! Post some pictures. I want to see.
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1971 cheyenne k10 4 speed np 205 454 BB factory a/c  Never drink down stream of the herd! Eric |
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08-05-2007, 10:17 PM
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#9 |
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I'm a poor spectator
Join Date: Aug 2006
Location: San Antonio, Tx
Posts: 2,287
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Re: New to the forum
Yeah, it should bolt right in. I think the old bellhousing will even work with 465. you might need a different adapter for the transfer case though i'm not sure, someone else should know that for you.
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2006 Jeep Unlimited IMPACT ORANGE 1993 Chevy 2500 4x4 ExCab LWB 454/NV4500 Tow rig  1977 Ford F100 2x4 LWB 1st truck I owned, still have it!!!  1979 Ford F150 4x4 SWB Built Ford Tough!!!  1971 Chevy Blazer 350 / SM465 / NP205 UNDER CONSTRUCTION Soon to have a LQ4 6.0!!! |
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08-06-2007, 09:42 AM
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#10 |
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Post Whore
Join Date: Feb 2000
Location: Rose Hill, KS, USA
Posts: 12,686
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Re: New to the forum
Welcome to the board. When I was contemplating swapping an SM465 in place of my three speed manual I had a few people tell me the bellhousing opeining for the tranny was slightly different sizes. I ended up doing a totally different swap so I never found out if that was correct. Just something for you to keep in mind.
In relation to the axle ratio question, I believe if you have an open differential you will need to turn the wheel two revolutions to determine the ratio. Best option is to go ahead and pull the cover. That way you are positive and can put in fresh lube while your at it.
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1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14 |
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08-06-2007, 05:34 PM
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#11 |
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Registered User
Join Date: Jul 2007
Location: Colorado
Posts: 3
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Re: New to the forum
Thanks for the feedback fellas. I'm kinda retarded on the computer as far as posting pictures. Maybe I'll figure it out someday.
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08-07-2007, 04:05 PM
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#12 |
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Registered User
Join Date: Mar 2003
Location: Cheboygan, MI
Posts: 998
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Re: New to the forum
Welcome, Jared. I know a Jared in Colorado. Did you race a yellow Camaro at Bandimere?
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Tony Johnson -- '71 Blazer w/L-31 Vortec 350, SM465, NP205, performer intake, edelbrock 1406, HEI, 4" lift, Boyd EFI tank, Vintage A/C My Blazer -- |
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08-07-2007, 07:52 PM
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#13 |
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urban fourwheelin
Join Date: Aug 2002
Location: Seattle
Posts: 1,007
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Re: New to the forum
welcome from the 206....
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1972 K5 Blazer with Cummins 4BT, NV4500 swap in the parts gathering stage. |
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08-07-2007, 08:43 PM
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#14 |
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Registered User
Join Date: Jul 2007
Location: Colorado
Posts: 3
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Re: New to the forum
No camaro. The only car I ever owned was a VW.
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