Just purchased this 1978 Ford recently and am unfamiliar with their engines. So I need some help identifying exactly what I have in mine. I believe it’s a 351 but not 100% positive.

 

According to your VIN and the decal on your valve cover the original engine your truck came with from the factory was a 400. Do you know is your engine still original to the truck?

 

Honestly I didn’t ask when buying it. I was told it was a 351 but I also noticed the sticker on the valve cover too and it threw me off.

 

Welcome to FTE.

The full decode, FWIW, just because....

F15 = F150 pickup

S = 400 2V gas V8

K = Kansas City Assembly Plant

CG0489 = 1978 numerical series, July 1978 production

135 = 135 inch wheelbase

S8
S = Bright Dark Blue Metallic
8 = Light Blue

F150 = F150 pickup, 4x2, 6,050 lbs GVWR

NB4
NB = Ranger Lariat, Blue all vinyl.
4 = Ranger XLT with styleside pickup box. (conflict between two different sources)

G = Ford 3 speed automatic transmission, probably C6.

13A
13 = Ford (9 inch) rear axle, 3,750 lbs capacity, 2.75 ratio, non-limited slip
A = Adjustable steering column with power steering

06050 = 6,050 lbs GVWR

1978 = Model Year

52 = Dallas District Sales Office
No special order.

 

Welcome fellow Texan. Looks like you have acquired a very nice, unmolested truck. Great find.