Truck

Year(s)	Engine	Core Size	Rows
1948-54	6 Cyl	20-1/4 x 19-3/4	2

NOTE: 1/2 Ton - 3/4 Ton, Special Brackets For More Clearence w/ Later 6 Cyl Conversions

Year(s)	Engine	Core Size	Rows
1948-54	6 Cyl	22-1/2 x 20-1/2	3,4

NOTE: 1 Ton, Factory 2-5/8" Thick Core

Year(s)	Engine	Core Size	Rows
1948-54	All	22-1/2 x 20-1/2	4

NOTE: Larger Hose Connections for V8

Year(s)	Engine	Core Size	Rows
1948-54	V8	20-1/4 x 19-3/4	2

NOTE: 1/2 Ton - 3/4 Ton, Larger Hose Connections For V8 Engine Swap

Year(s)	Engine	Core Size	Rows
1948-54	V8 SB/BB	22-1/2 x 20-1/2	3,4