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Part Stores  >  Car Engines Store  >  GMC  >  V8, 6.6 L, 400 CID Rebuilt Engine

1974 - 1980 GMC V8, 6.6 L, 400 CID Rebuilt Engine

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Part NameV8, 6.6 L, 400 CID Rebuilt Engine
Automobile GMC
Stock No.AGCHV400LB
DescriptionSmall block, 2-bolt main.
Size6.6 L, 400 CID
Engine TypeV8
Fuel TypeGasoline
Fuel DeliveryCarburetor
AspirationNon Turbo
Head Casting333882 3973493 3998997
Block Casting330817
Crank Casting3951529
Discount/Sale Price1,273.00 *
* - price as of 06/24/2009. Actual prices may vary.

1976 - 1979 GMC C35/C3500 Pickup
1975 - 1980 GMC K15/K1500 Pickup
1975 - 1979 GMC K15/K1500 Suburban
1975 - 1980 GMC G25/G2500 Van Vandura
1975 - 1980 GMC G25/G2500 Van Rally
1980 GMC G25/G2500 Van
1976 GMC G15/G1500 Van Vandura
1979 GMC G15/G1500 Van Rally
1975 - 1980 GMC G35/G3500 Van Rally
1975 - 1980 GMC K25/K2500 Pickup
1975 - 1980 GMC G35/G3500 Van Vandura
1974 GMC Sprint Custom
1976 GMC Sprint Custom
1975 - 1980 GMC K25/K2500 Suburban
1976 GMC Sprint
1980 GMC C15/C1500 Pickup Big Ten
1976 - 1980 GMC G35/G3500 Van
1976 GMC C15/C1500 Pickup
1978 - 1980 GMC C15/C1500 Pickup
1976 - 1979 GMC C25/C2500 Pickup
1977 - 1980 GMC K35/K3500 Pickup
1978 GMC C25/C2500 Suburban
1980 GMC C25/C2500 Suburban
1975 - 1979 GMC Jimmy

GMC Engine Quality

Most rebuilt GMC engines are just that, rebuilt. Our GMC remanufacturing line builds to IMPROVE not just REPLACE! All parts in our high quality GMC performance engines (long blocks, short blocks, big blocks & small blocks) meet or exceed all the GMC original specifications, and most of the time are purchased from the same suppliers who supply GMC!

All the moving parts in our GMC remanufactured engine are NEW. Be cautious of other engine remanufactures using used, broken, re-machined or returned parts!

Due to our precise re-manufacturing standard, the GMC Engine line has achieved one of the lowest breakdown rates in the world - Below 1.5% breakdown rate

We keep a large inventory of GMC remanufactured engine blocks mostly for passenger cars, light trucks, pickups and some marine applications. Most of our GMC engine supply is ready for instant freight.

GMC Engine Description

  • Our entire GMC long blocks (small or big blocks) come with cylinder heads and valve train installed. Note, you have to reuse the existing valve cover(s), timing cover, intake manifold and oil pan from your original GMC car, truck or SUV.
  • The GMC long blocks have NEW valves, valve springs, valve keepers, push rods, rocker arms, fulcrums, lifters, camshaft, timing chain (belt), timing gears, valve guides (diamond honed), three angle seats, cam, rod and main bearings, pistons, piston rings, rod bushings when applicable, gaskets and oil pump.
  • The GMC cylinder blocks, cylinder heads, crankshafts and connecting rods are cleaned and shot peened and magnafluxed for cracks. All the GMC motor bolt holes are tapped.
  • The GMC Cylinder blocks are bored to each piston and diamond honed to 18RMS finish. All oil galleys are hand brushed with white cleaning brushes and cylinders are hand cleaned with cleaning solution and white towels.
  • Your GMC cylinder heads have each valve guide diamond honed, seats are three angle. Following assembly, your GMC motor heads are vacuum checked for valve seating.
  • This GMC crankshafts are ground and polished to 12RMS. Each oil galley is hand brushed with a white cleaning brush.
  • All connecting rods on the GMC block are honed.


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