found a special edition silverado
 

i found a specil edition silverado in a junkyard. i took a picture of the glove box codes can yall tell me what rear end ratio it has and what motor and trans and anything else about it.


thanks yall


http://67-72chevytrucks.com/gallery/...1_15_10_59.jpg


http://67-72chevytrucks.com/gallery/...1_15_11_12.jpg

Re: found a special edition silverado
 

All it has is a L03 305 V8 motor and a G80 rear axle.

Re: found a special edition silverado
 

and its a 1987 CHEVROLET R10

Re: found a special edition silverado
 

3.08s I think, have to look at the RPO list again.

Re: found a special edition silverado
 

Its a 2:73 Posi rear.

GU2 2.73 Rear
GU4 3.08 Rear
GU5 3.23 Rear
GU6 3.42 Rear
GT4 3.73 Rear
GT5 4.10 Rear
HC4 4.56 Rear

Re: found a special edition silverado
 

what says that its a posi?

Re: found a special edition silverado
 

code G80

Re: found a special edition silverado
 

i dont think that rear would be useful for anything but a lowrider truck on 13's or 14's lol. 2.73 with a posi? i woulda needed that back in my high school days with my 79 blazer with hyrdraulics on 14" whitewalls and spokes. woulda helped alot in the rain, otherwise tho, dont think that rear is anything special

Re: found a special edition silverado
 

g80 rpo is posi limited slip
lo3 is 305 tbi
gq1 std axle ratio
gu2 2.73 ratio rear axle
k81 66amp generator
md8 transmission thm 4 speed 700r4
n31 steering wheel custom
n67 wheel rally type
u69 am/fm radio
u76 winshied antenna
v43 rear painted bumper w step
z53 intr cluster oil,temp,volts,cool
18d trim combination dark charchoal (D)
18i interior trim dark charchaol
19l exterior secondary color lamp black
72u primary exterior color med garnet red
77a exterior accent stripe victory red

Re: found a special edition silverado
 

g80 is gov loc not posi. At least that's what I've been told and more true on the nwer trucks.

Re: found a special edition silverado
 

G80 is GM's Limited slip differential.

Re: found a special edition silverado
 

I thought g90 was "locking differential" that's what our 84 said anyways.

I don't know if the old style clutch posi's had the same code or not but those were the way better ones anyways. I don't even consider a gov loc a posi, they suck.

Re: found a special edition silverado
 

With a 305 700R4 and 2.73 rear what rpm was this thing lugging on at 65-70 mph?!? 1.600 or so???

Wouldn't that be lugging the 305 like crazy?
Think 3.08 to 3.42 would be much better for that engine thus better mileage or am I missing something?


erik

Re: found a special edition silverado
 

Unbelieveably crazy... My '88 can barely handle running OD with 3.08 rears, however sometimes I get lucky and get some good mpg numbers. I hit 20 mpg once, most of the time is 15-17.

Re: found a special edition silverado
 

G80 on a truck = Gov Loc, not a limited slip, a factory locker. They're OK for a commuter and normal (read "light duty") use, but they won't take abuse.

Re: found a special edition silverado
 

well my truck already has 2.73 ratio open 10 bolt so i might just swap in the posi rear end and buy a gear set

Re: found a special edition silverado
 

and the door panels and some dash parts

Re: found a special edition silverado
 

SO how about some pics of the outside of this special beast?