When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Hello fellow enthusiasts. Still working on the 1960 F 250 and just ran into major roadblock. Turns out the motor in my 69 has been dressed up to look like a y block but is instead either a 390 or 428. Casting numbers say C6ME. Exhaust manifold says C6AE-R (and are shot BTW) and the only numbers on the back of the block are 352 with the numbers 38 underneath and where the starter is, it’s stamped 352 with the numbers 22 underneath. i am pulling my hair out trying to figure this out. I stripped the block down to bear bones so I can’t measure stroke. Any help would be much appreciated. Thanks. Jarheadjo
No chance measuring bore and stroke, engine is disassembled. Truck came out of Oklahoma and the old timer I bought it from had placed the air cleaner on it and the original radiator. I didn’t care as I wanted the truck, it was solid. Any help I’d ing this motor much appreciated. Novice mechanic trying to make the dream happen
This wont narrow it down to the exact engine size but is the distributor up front by the radiator or in the back by the cab? 352's had the distributor forward and a 292 Y block would have it by the cab. Not sure if you can tell with the engine apart though... Do you have a good pic of all the engine parts together? That may help narrow it down to whether its an FE or Y block but not the exact engine size.
The only way to measure the bore is when the engine is disassembled. The stroke is determined by the crankshaft which I am assuming is out of the block. Measure from the centre line of the crankshaft to the centre line of the connecting rod journal. Multiply this number by 2 and voila you have the stroke! Bore x bore x stroke x number of cylinders x 0.7854 = engine size.
Look on the crank for a marking like this. They are all marked with an ID number. Post it and I will see if it is listed in my interchange book. This pic is a 73, 351C not an FE.
The C6AE-R couldn't have come on an older Y-block like 292. That's also not the exhaust manifold casting number. That's the casting number on the poor mans Cobra Jet heads. Good heads if you rework them, provided they are not shot to begin with - you can grind to the Cobra Jet valve sizes and open up the exhaust ports quite a bit.
Definitely an FE engine -
C6AE-R heads typically came in mid-late 1966 FE engines and some earlier 1967 FE engines of any type except 428PIs and except 427s, since the intake manifolds were not compatible with the 1958-65 type intake port that the C6AE-R head has. 352 pickups of the time frequently got C6AE-R heads, as did any FE car built when they were available on the production line.
I really appreciate all of the assistance that is coming my way. I am sure it is evident that I am a novice, and that is okay. Mistakes will be commonplace and knowledge will be lacking but determination and motivation abound. This site is like a brotherhood/ sisterhood and I appreciate it. I will look for the mark on the crankshaft and get back with you Sir. Jarheadjoe.
