Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
1991 Buick Commercial Chassis Parts
ADD A VEHICLE TO GUARANTEE PARTS FIT
See products that fit
PROFORM
Aluminum Harmonic Balancer Cover for Small Block Chevy with 6-3/4" Balancer in Black
Part Number: 778-66517BKC
$2325$31.99
YOU SAVE
$8.74
Ships on Nov 02, 2026
Lowest price guarantee
PROFORM
Aluminum Harmonic Balancer Cover for Small Block Chevy with 6-3/4" Balancer in Black
Part Number: 778-66517BKC
Ships on Nov 02, 2026Lowest Price Guarantee$2325 $31.99
YOU SAVE
$8.74
PROFORM
Small Block Chevy Chrome Moly 1-Piece Pushrods 5/16" Diameter in +.100" - 7.900" Length
Part Number: 778-66892C
$6975$93.99
YOU SAVE
$24.24Ships on Nov 02, 2026Lowest price guarantee
PROFORM
Small Block Chevy Chrome Moly 1-Piece Pushrods 5/16" Diameter in +.100" - 7.900" Length
Part Number: 778-66892C
Ships on Nov 02, 2026Lowest Price Guarantee$6975 $93.99
YOU SAVE
$24.24
PROFORM
Stamped Steel Long Slot Rocker Arms for Small Block Chevy with 1.5 Ratio & 3/8" Stud
Part Number: 778-66905
$9199
Ships on Nov 02, 2026Lowest price guarantee
PROFORM
Stamped Steel Long Slot Rocker Arms for Small Block Chevy with 1.5 Ratio & 3/8" Stud
Part Number: 778-66905
Ships on Nov 02, 2026Lowest Price Guarantee$9199
PROFORM
Aluminum Roller Rockers for Small Block Chevy with 1.5 Ratio & 7/16" Stud
Part Number: 778-66909
$21699
Ships on Nov 02, 2026Lowest price guarantee
PROFORM
Aluminum Roller Rockers for Small Block Chevy with 1.5 Ratio & 7/16" Stud
Part Number: 778-66909
Ships on Nov 02, 2026Lowest Price Guarantee$21699
![66914 Self-Aligning Aluminum Roller Rocker Arms, 1.5 Ratio for Chevy Small Block Engines w/Centerbolt Heads [3/8 in. Stud]](https://www.jegs.com/images/mini_100/700/778/778-66914.jpg)
PROFORM
66914 Self-Aligning Aluminum Roller Rocker Arms, 1.5 Ratio for Chevy Small Block Engines w/Centerbolt Heads [3/8 in. Stud]
Part Number: 778-66914
$23599
Ships on Nov 02, 2026Lowest price guarantee![66914 Self-Aligning Aluminum Roller Rocker Arms, 1.5 Ratio for Chevy Small Block Engines w/Centerbolt Heads [3/8 in. Stud]](https://www.jegs.com/images/mini_200/700/778/778-66914.jpg)
PROFORM
66914 Self-Aligning Aluminum Roller Rocker Arms, 1.5 Ratio for Chevy Small Block Engines w/Centerbolt Heads [3/8 in. Stud]
Part Number: 778-66914
Ships on Nov 02, 2026Lowest Price Guarantee$23599
PROFORM
Self-Aligning Aluminum Roller Rockers for Small Block Chevy with 1.6 Ratio & 3/8" Stud
Part Number: 778-66915
$23999
Ships on Nov 02, 2026Lowest price guarantee
PROFORM
Self-Aligning Aluminum Roller Rockers for Small Block Chevy with 1.6 Ratio & 3/8" Stud
Part Number: 778-66915
Ships on Nov 02, 2026Lowest Price Guarantee$23999
PROFORM
Aluminum Roller Rockers for Small Block Chevy with 1.5/1.6 Ratio & 3/8" Stud
Part Number: 778-66920C
$22699
Ships on Nov 02, 2026Lowest price guarantee
PROFORM
Aluminum Roller Rockers for Small Block Chevy with 1.5/1.6 Ratio & 3/8" Stud
Part Number: 778-66920C
Ships on Nov 02, 2026Lowest Price Guarantee$22699
CLEVITE MAHLE
Exhaust Manifold Gasket Set 1955-1995 Small Block Chevy V8 265/267/283/305/307/327/350/400
Part Number: 695-MS7110X
$799
Ships on Nov 02, 2026Lowest price guarantee
CLEVITE MAHLE
Exhaust Manifold Gasket Set 1955-1995 Small Block Chevy V8 265/267/283/305/307/327/350/400
Part Number: 695-MS7110X
Ships on Nov 02, 2026Lowest Price Guarantee$799
CLEVITE MAHLE
Cam Bearing Set Chevy 1967-2002 V8 267/283/302/305/307/327/350/400 (4.4/4.6/5.0/5.4/5.7/6.6L)
Part Number: 695-SH290S
$3399
Ships on Nov 02, 2026Lowest price guarantee
CLEVITE MAHLE
Cam Bearing Set Chevy 1967-2002 V8 267/283/302/305/307/327/350/400 (4.4/4.6/5.0/5.4/5.7/6.6L)
Part Number: 695-SH290S
Ships on Nov 02, 2026Lowest Price Guarantee$3399
CLEVITE MAHLE
Automatic Transmission Gasket 1982-2012 GM 700R4/4L60/4L60E in Cork-Rubber
Part Number: 695-W39365
$1351
Ships on Nov 02, 2026Lowest price guarantee
CLEVITE MAHLE
Automatic Transmission Gasket 1982-2012 GM 700R4/4L60/4L60E in Cork-Rubber
Part Number: 695-W39365
Ships on Nov 02, 2026Lowest Price Guarantee$1351
ATK ENGINES
Remanufactured Crate Engine for 1987-1993 Chevy/GM Cars with 305ci/5.0L V8
Part Number: 059-VC36
$2,03999
Ships on Nov 02, 2026Lowest price guarantee
ATK ENGINES
Remanufactured Crate Engine for 1987-1993 Chevy/GM Cars with 305ci/5.0L V8
Part Number: 059-VC36
Ships on Nov 02, 2026Lowest Price Guarantee$2,03999
ATK ENGINES
TQBU18A Remanufactured Automatic Transmission Torque Converter for GM TH700R4/4L60 87-95
Part Number: 059-TQBU18A
$12999
Ships on Nov 02, 2026Lowest price guarantee
ATK ENGINES
TQBU18A Remanufactured Automatic Transmission Torque Converter for GM TH700R4/4L60 87-95
Part Number: 059-TQBU18A
Ships on Nov 02, 2026Lowest Price Guarantee$12999
ATK ENGINES
Remanufactured Automatic Transmission Torque Converter for GM TH700R4/4L60 87-95 HS
Part Number: 059-TQBU18AH
$11999
Ships on Nov 02, 2026Lowest price guarantee
ATK ENGINES
Remanufactured Automatic Transmission Torque Converter for GM TH700R4/4L60 87-95 HS
Part Number: 059-TQBU18AH
Ships on Nov 02, 2026Lowest Price Guarantee$11999