Nicely done. One thing, as a flow bench operator for over 20 years, I'd like to see you get the biggest air filter you can make fit on your engine., even if you have to give up the 1" spacer. The spacer is normaly a good thing so keep it if you can but it's amazing how much air flow a motorcyc...

With my 89, the build codes are also in the glove box. It does have 3.23 gears in it (gu5) but not the posi.

Yes-that is a nice looking van.Other than the over bore, carb,intake,headers,did you do a anything else to the engine??.Welcome to the site. Other than whats listed, its a stock gm performance engine. That engine with stock exhaust is rated at 290hp and 326 ft/lbs of torque, so with those mods, it ...

Yeah-the G80 code is a posi in a Astro.AWD's have to have matched ratios front and back.Didn't see if your's is a AWD. No, mine is just a 2wd. I have some gears and a posi out of a 4th gen f-body which is why I was asking about the axle spline count. But if I could find a rearend with a posi, that ...

I had already swapped my astro with a 355 crate motor before I knew about this site. Wish I had looked for you guys earlier. Anyways, here's some pics and stats: -350 GM performance crate motor bored to 355 -edelbrock performer carb and intake -holley electric fuel pump -3rd gen f-body serpentine se...

Cool, that answers my question. Is there anywhere online I could find specs on the rearends? What I really need is one with a posi but I don't know if they made them in astros with one. It would make sense with the awd models but I am not sure.

Just wondering if anyone knows the spline counts on the 10 bolt rear ends on the astros and safaris. I am sure the early ones are low like 16 or something but I need to know if any year has a read end with a 28 spline axle.
Thanks,
Jim