1978 Econoline VIN
351C/M/400 335 series: 8 bolts in rectangular valve covers. Timing chain housing is part of block. Thermostat housing on block. Exhaust bolt holes diagonal.
351M/400 335 series: intake is 12.7" wide the 351C is narrow. The 351M and 400 are identical externally, only internal parts examination can tell them apart.
351W/302/5.0L 6 bolts on trapezoidal valve covers. Thermostat housing on intake. Exhaust bolt holes horizontal.
429/460 385 series: 7 bolts in rectangular valve cover
352/360/390/427/428 FE series: Intake goes under valve covers.
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E14 = E150 cargo van
H = 351 2V gas V8 (Note 390s never used in vans, were gone well before '78. 351 may be W or M model, I'm not sure. See the number of bolts in the valve cover info above)
B = Oakville Assembly Plant
CC4286 = 1978 numerical series, May 1978 production
Basic connections, condition of cables, fusible links, ignition modules, and any electrical component in the path between the alternator and the spark plug.
Start at the battery and check everything.
No fun, but that's part of the fun.










