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Posted: Sun Mar 05, 2017 10:30 pm
1975 Monza2+2 350/350 posi. What kind of production numbers, please. Found one that is numbers matching, is it worth anything? Not like new but very fixable. Thanks.
Posted: Sun Mar 05, 2017 11:39 pm
Not sure of the value buy Bryan's page has a wealth of info.
Rickhttp://monza.homestead.com/files/Specia ... bersWP.htm
Posted: Mon Mar 06, 2017 7:57 am
PM the other Brian ( stage169 )
He has a lot of the production figures..,...
Doug in P.R.
Posted: Mon Mar 06, 2017 7:51 pm
The 350 V8 was a one year only car in California only. So it is pretty rare, I believe there was approximately 3300 made with the the 350. Value wise it's a tough call, depends on condition. It may add a little value but these cars are challenged to bring top dollar
The 75's are kind of unique anyway being the first year of production. So they are cool in my opinion, of course I am just a little biased
Posted: Tue Mar 07, 2017 1:14 am
Thanks all for responding.
Posted: Tue Mar 14, 2017 2:47 am
Bad thing is 75 rears are different, weaker, panhard bar is different, front brakes are weaker. BUT according to my info GM quit servicing solid rotor spindles and upgraded quite afew 75s with later spindles, calipers and master cylinders. Also 76-up calipers,prop valve work fine with S10 calipers as pistons are same size. I swapped in S10 rearend and when i had manual brakes used manual S10 wheel cylindrrs. The brakes , with raybestos brute stop pads were phenominal. Out stopped a Corvette! But also had 225/50 275/60 tires.
Posted: Tue Mar 14, 2017 7:57 am
Why do you think the 75 rears are weaker? Same 7.5" as later years. While the panhard bar does use the one year only curved one, it works and serves the purpose, it is harder to adjust if the rearend isn't perfectly centered I'll admit but I installed a adjustable heavy duty heim joint on one end that took care of that. I agree the solid disc front and small rear brakes need upgrading but that is easily done with bolt on parts.
Posted: Tue Mar 14, 2017 9:13 am
Agreed that the rear is mostly identical. You could say the rear was weaker in that the 75 still used the same weak brake setup as the 71-75 Vega. Nothing a set of newer backing plates/drums can't fix.
Posted: Sun Mar 19, 2017 10:03 pm
cjbiagi wrote:While the panhard bar does use the one year only curved one, it works and serves the purpose, it is harder to adjust if the rearend isn't perfectly centered I'll admit but I installed a adjustable heavy duty heim joint on one end that took care of that.
..Are you suggesting here that the panhard bar is adjustable? We are about to install a curved 75 Cos panhard with fresh bushings that is non-adjustable. How did you determine that the rear end was not perfectly centered and required the heims joint on the panhard to find your center?
thanks in advance.
Posted: Sun Mar 19, 2017 10:38 pm
I noticed the rearend being off center when I installed larger wheels and tires and noticed different clearances side to side. The curved panhard bar is not adjustable (actually GM's method of adjusting it is to bend it which would make it longer or shorter) so I cut off the bushing on the rearend side of the bar and had the end threaded to accept a high quality teflon lined heim joint to allow me to adjust it.
Posted: Sun Mar 19, 2017 11:58 pm
Yeah, 75 rear and panhardbar are one year only. Havent tried to swap in later bar and rearend. My 75 was rusted pretty bad and wound up ripping the left lower mount out. My 77 I welded in the lower arm area for the rear lower control arm, up where all the pinch welds are. I also had planned to reinforce this area. Now that I have seen some older racing subframe connectors I have a few ideas to go along with my other mods.
Posted: Tue Mar 21, 2017 2:48 am
Clyde Does your rear end not have a shim arrangement like the '76>'80 this goes behind the bracket where it bolts to the body work.
Clyde wrote:The curved panhard bar is not adjustable (actually GM's method of adjusting it is to bend it which would make it longer or shorter)
There is now available an adjustable "Poly" end for your Bar if you wanted but may require some custom fab. as there aren't any listed that seem like the width of the Monza joint [not by my memory any ways]. Harry https://www.ballisticfabrication.com/co ... ccessories
Posted: Tue Mar 21, 2017 9:13 am
Yes, I am sure you could find something from that place that would work. Trickiest part of the ordeal is to be able to drill and tap the end of the bar after you cut the bushing off. I think I went with a 1/2" threaded joint so it's a pretty big hole to drill and fairly deep for proper thread engagement. I had a friend who worked in a machine shop so I just had him do it for me. Simple if you have the right tools......
Posted: Wed Mar 22, 2017 12:04 am
For all you 75 model owners out there I got an adjustable panhard bar from Spohn performance a while back. They still list them for 150 bucks. They list adjustable control arms as well.