Stock Alternator for 87 .....
 

... with TBI, air, power door locks and windows.

I need one, and have gotten prices from every amperage from 78 to 105. Two pin and 4 pin.

Any idea wha the stock application is?

Re: Stock Alternator for 87 .....
 

Take a look at your alternator and compare it with the following pics from NAPA's websight. 1'st ones are of a 94 amp alternator in the old body style that can be used in any GM vehicles from 73 all the way up to 88 with an internally regulated alternator even if it originally had a 42 - 65 amp alternator from the factory.
http://partimages.genpt.com/partimages//686826.jpg
http://partimages.genpt.com/partimages//686825.jpg
Connector Diagram;
http://partimages.genpt.com/partimages//728185.jpg

Part: RAY 2134349
Product Line: NAPA Power Supreme Electrical

Features & Benefits
Bearings: 100% New Electric Motor Quality. Extreme Temperature Grease & High Temperature Double Lip Seal.; Rotor & Stator Are Electically Tested For Maximum Ouput & Insulation Integrity.; Slip Rings Are Precision Polished, Turned Or Replaced.; Rectifier 100% Tested w/ The Latest Test Equipment Or Replaced w/ A New Rectifier.; All Brushes Replaced w/ 100% New High Quality Brushes.

Features and Benefits PDF

Attributes
Alternator Amperage : 94 Amp
Alternator Clock Position : 12:00
Pulley Type : 1 Groove
Voltage Regulator Type : Internal

Warranty
Warrantied To Be Free Of Defects In Workmanship/Materials For THREE (3) Years Following Date Of Purchase. Light Trucks/Vans With Diesel Engines Under 8000 lbs. GVW Warranty Is ONE (1) Year. This Warranty Is Not Transferrable.

Warranty PDF

Material Safety Data Sheet (MSDS)
There is no MSDS for this item
Application Information: 1987 Chevrolet Truck R10 1/2 Ton - Pickup
Engines : 5.7 L 350 CID V8
Comments: w/ 94 Amp Alternator;w/ 1 Groove Pulley
Per Car Qty: 1

http://partimages.genpt.com/partimages/813690.jpg
http://partimages.genpt.com/partimages//813689.jpg
Connector diagram;
http://partimages.genpt.com/partimages//889685.jpg
Part: RAY 2134523D
Product Line: NAPA Power Supreme Electrical

Features & Benefits
Bearings: 100% New Electric Motor Quality, Upgraded w/ 10 mm Bearing In Rear Housing. Extreme Temperature Grease & High Temperature Double Lip Seal.; Rotor & Stator Are Electically Tested For Maximum Ouput & Insulation Integrity.; Slip Rings Are Precision Polished, Turned Or Replaced.; Rectifier 100% Tested w/ The Latest Test Equipment Or Replaced w/ A New Rectifier.; All Brushes Replaced w/ 100% New High Quality Brushes.

Features and Benefits PDF

Attributes
Alternator Amperage : 100 Amp
Alternator Clock Position : 11:00
Voltage Regulator Type : Internal

Warranty
Warrantied To Be Free Of Defects In Workmanship/Materials For THREE (3) Years Following Date Of Purchase. Light Trucks/Vans With Diesel Engines Under 8000 lbs. GVW Warranty Is ONE (1) Year. This Warranty Is Not Transferrable.

Warranty PDF

Material Safety Data Sheet (MSDS)
There is no MSDS for this item
Application Information: 1988 Chevrolet Truck C1500 1/2 Ton - Pickup
Engines : 5.7 L 350 CID V8
Comments: w/o Pulley;w/ 100, 105 Amp Alternator
Per Car Qty: 1