[quote author=somethingspecial link=board=1;threadid=2037;start=0#msg13515 date=1124240082]
Go to Ebay, and type in 7984463489, this is a block I purchased and it has a picture of the serial #. I hope this helps. Just type in the item # on the search line. Mike
[/quote]
Mike;
Were exactly was the partial VIN stamped? Also, I noticed the seller stated the "X" code blocks didn't use casting #'s. I would have assumed all blocks used casting #'s. The 390 GT uses the same block and oil pump as the standard 390. Oil pans were stamped steel and some even received baffles, but no windage trays. The difference came in that the GT used the same camshaft as the 428 CJ from 1966-1968. All engines used a single point distributor. Crankshaft, rods and pistons were also carryovers from the standard 390. Heads were different from the standard 390. GT cylinder heads were cast and machined to accept the 14 bolt hole (per side) exhaust manifolds, while the typical 390 used only 2 bolt hole exhaust manifolds. Intake manifolds were also different in that they were a little taller and were stamped with a large "S" casting mark near the thermostat housing.
Specs: Hydraulic lifter 6.4 litre, 4.05" bore X 3.784" stroke, 10.6:1 compression, 325 hp @ 4800 RPM with 427 ft lbs torque @ 3200 rpm.
That could explain why on my buddies car we couldn't find a casting #. They used an "X" code block but, put the GT stuff on it. Strange. Ford never cease's to amaze me with how they did some things.
Don