The 2v carb and intake being the only difference whereas the Y code motor has a lower compression ratio and of course has lower horse power. All your comments will be welcome.The H code engine in my '66 Comet when taken apart for rebuild had all the same internals as an S code motor used in GT Mustangs and Fairlanes etc. I still have the other COMPLETE engine that came with this short block the story is about. And I would put a 352 as original or a 390 if I get one. The V-8 that goes in will be a stock complete rebuild. The truck is just a stock appearing driver, no hot rodding, no wind the sh- out of it. I'm about sure I'm going back to the V-8 this time. OE was 352, it is gone, gave it away 12 yrs ago. I'm into my second resurrection of my 66 F-250. Mr Wilson All your comments will be welcome. Was the 390 an option in light trucks in 68 ? I'm guessing it is a 68 390 light truck engine. But rods with A=auto in code says car engine? Pistons with T=truck in code says truck engine? Bill W says 68 thru 76 in light trucks were 360's. There is a bit of metal missing from the bottom of 1 cyl wall in crankcase area. walls have drag scores and some piston skirts. When I separated the rod from crank the brng shells fell out and after when putting cap back on rod on bench, the shells just rocked in each half. NOW the rod bearing inserts on the aftermarket piston were just about ready to spin. There are 7 pistons as I described above and 1 aftermarket piston totally different in wrist pin webbing area. All the rod journals you can slightly catch you fingernail across the grind surface, I haven't removed a main cap yet. I'm telling all this as sort of "the rest of the story" This engine has been BEAT on. The pistons are Fomoco, C8TE 6110 H, which I code out to be C8=1968, T=truck, E=engine, 6110= parts group, pistons(I think) H= I don't know. Rods are all C7AE B, I don't know if that's beginning of Part # or Engineering #, which I code to be C7=1967, A=auto, E=engine, I can't find what the B stands for, maybe 2nd version or a revision. It has Clevite bearings that DON'T fit the full width of the insert surface of rod and cap. 010 under-size, there are 3 stamped letters, prob people who did the re-grind. The crank has been reground and re-balanced. Looking at the crankshaft I find No visible part or engineering code, crank is still in the block. You remember, no block casting # but we have casting date 47A and I believe is A=Jan, 4=Day, 7= 1967. So what is it? Bore 4.03, Stroke 3.75, says it's a 390 (Don't pick on me for being thousandth or two off) done with digital Vernier Caliper a couple of times. Well I had a chance to get into the short block this thread is about. I have cyls soaking and will pull front cover, gears and chain to take cam and lifters out of the stuck situation. Hoping some of you can clue me in what I have. It and the long block were sitting in a leentoo out of weather but exposed the atmosphere. I know I have to free it up to measure the stroke. I know rods are # ed from new assy, didn't think pistons were, especially top and bottom. I'm thinking this engine was balanced other than factory. 6 of the pistons are in their respective holes, the two that aren't are just opposite where they should be. The pistons are numbered, 1 thru 8, on the top in center and they are numbered underneath on the lower wrist pin boss. The pistons have 4 valve recesses, plus a circle recess in the middle. 037, there is a patina on the wall surface that I cleaned a bit to measure the bore which should be 4.04 for the 360-390. ![]() ![]() Finally in the lifter galley between cyl 3 and 4 is 77. Next near the surface where the oil filter base bolts on is 47A. On left SIDE forward is 48 DIF, which I'm aware is the foundry where it was cast with the 48 being a code possibly for who cast it. On the rear behind the flywheel is 352 over the top of 62. The ever present 352 on the left front of block. This engine is stuck at this time, but the reason I want to identify is there is NO ridge on the cylinder tops and it could be a very sound engine. In regards to the short block there is no casting # on the block.
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