You sure it isn't a V12? GMC made a 702 cubic inch V12 in the early 60s that was basically two 351 cubic inch V6 engines hooked together in-line. They also had a Twin HydraMatic transmission that was one HM mounted right side up and another under it upside down, giving 7 speeds.
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Last edited by Bill Hanlon; 04/23/2026 12:51 AM.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.