No, it's not a Detroit...it's a GMC. They called it the "Twin Six" if I remember right. GMC put two of their 351 cu in V6 motors together. This monster has 1 long block, 4 heads, 4 exhaust manifolds and 2 intakes.
Mike
Mike Boteler
1956 Chevy 3100 Resto Rod 1952 Willys M38 Army Jeep 1983 Jeep CJ7 Laredo 1984 Jeep CJ7 +++++ Silver Spring, MD