Re: Some big questions.....
hey if you are interested I could get some measurements and/or pics of a 75ish blazer axle to see if the later 1/2 4wd parts would work, I have one sitting out by my gmc that I could check. If these are a bolt up like was stated earlier this would be easy to find in any junk yard. You may be able to use the axle off of a later truck but you cannot use the pump because 1968 was the last year that they had the short water pump so after that all the bracketry changed. I would think that you could pull that off of your 68 though. Good luck and let me know if you would like pics or measurements, the only thing is that I won't be home until friday.
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68 3/4 ton  (Project)-350 Small Block, .030 over, 10:1 comp, 3998993 heads, C3BX edelbrock intake, comp cams XE268, Holley 670 SA, long tube headers, dual flow 40's, E-fan, Alum rad, currently under the knife getting shortened and bagged build thread
41 3/4 ton  (wife's)-flatbed, fully restored to original
01 Tahoe LT 4WD (my daily driver)-Magnaflow Muffler, Rollin on 22's
02 Ford Mustang Convertable (Wife's Car)-Flowmaster 50, Clear corners, Intake, sittin on 18's
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