A left side '55 V-8 exhaust manifold is supposed to clear the steering box and has the pad to mount your generator or alternator on. A little restrictive,but for a truck that won't matter.
Speed


1954 GMC 350
1957 GMC 1/2 ton
1962 Chevy C-30
1952 Chevy 6400 dump bed project truck
'98 Harley FLSTC
'66 Pontiac Catalina
'76 Chevy 1 ton Duallie
'84 Bronco II
'78 Dodge W-200
'81 Toyota 4X4 truck