Hy baldybenny and guys, a little research has yielded some more info, 1937 and 38 F33H models were powered by a GMC 286 cubic inch engine. This engine has the firing order 142635, it appears that this engine is a three piece design, with the cylinder bank being removeable from the crankcase. The cam is located on the same side of the block as the light/medium duty engines, so it may indeed have the spark plugs on the right side of the block. Baldybenny and 1936only thanks for buying this one and telling us about it, it is helping me expand my knowledge on this vintage of GMC, I hope the above information helps.
