Dog (subspecies name Canis lupus familiaris) also known as hound is a subspecies of the grey wolf (Canis lupus), a member of the Canidae family of the mammilian order Carnivora. The term domestic dog is generally used for both domesticated and feral varieties.
GT40 and GT40P heads are probably the best factory production small block Ford heads. GT40 and GT40P heads have line designations on the end of each casting. 3 lines on the GT-40 and four lines on the GT-40P.GT40 heads are found on 96 and early 97 V8 Explorer/Mountaineers as well as 5.8L Lightnings and 93-95 Cobras. GT-40P heads are found on the 97 and newer 5 liter Explorer/Mountaineer V8s.The GT40P replaced the standard GT40 on the V8 Explorers and Mountaineers in early 1997.Prior Explorers and Mountaineers had Cobra GT40 heads that were milled to bring it's larger combustion chamber down to the size of the E7 heads to keep compression up. The 5.0 explorer intake was the same from 96-01.T40 and GT40P heads are probably the best factory production small block Ford heads. GT40 and GT40P heads have line designations on the end of each casting. 3 lines on the GT-40 and four lines on the GT-40P.
New Process / New Venture Gear 231 Transfer Case. 1  The Jeep NP 231 transfer case was introduced in the 1988 model year. Jeep's YJ Wrangler and the XJ / MJ Cherokees with the Command Trac option were the first models to feature it. The 231 was initially tagged as the 231AMC, and as ownership of AMC was taken over by Chrysler, it was later designated as the 231J. This transfer case was later to be called the NVG (New Venture Gear) 231J. Despite the different nomenclature, they are essentially the same transfer case, with the bulk of their parts interchanging. Chain driven transfer cases were first used in the 1970's with partial success - Jeep's Borg Warner QuadraTrac being a notable instance.