[kaw550]

I took my 302 out to repair a leaking freeze plug. Actually, the prior owner replaced the plug with a rubber expansion plug.

I found what appears to be a tag from when it was remanufactured. Anyone recignize it? I also found the block was painted gray.

I called Jasper. It was not one of their numbers.

I have no idea when it was rebuilt but it looks like it has been a while. Considering there is no paint left and the plug had been replaced.

[BuzzLOL]

.. Any particular reason why you care who rebuilt it?

[kaw550]

Just curious as to how long ago it was rebuilt and what was done to it.

Wondering about things like piston size, valve seats, cam.

[RWENUTS]

Maybe rebuilt by Ford.
Any time you see a Z on a tag on a ford motor you should think it was done by Ford.

[cobalt327]

You may never find out the rebuilder, but what you are really concerned with is whether there's anything left to be rebuilt the next time. The rebuilders have absolutely no qualms about taking a crank to -0.030" on the mains and rods, nor do they shy away from 0.060"-plus overbores.

[66GMC]

Yeah, that is a rebuilder tag alright. (Sorry, no idea whose ...)

I would expect that "Z 2730 D" would be a part number used to identify the intended application range, and the numeric number would be a unique serial number used by the reman for warranty and build records, etc.

I googled that and found the same "Z 2730 D" tag with a different serial #(114468),

and also found a "Z 2730 V 128375"

As far as identifying manufacturer and specifications, most remanufaturers and/or engine parts suppliers will indicate, at the least, oversize or undersize information right on the part. The remanuacturer also generally stamps dimensions on the block and crank. (i.e. 030 010 010 would decode to .030 overbore, .010 undersize on the mains and rods. Pistons are also usually stamped on the dome. (eg L2377.030)

[BuzzLOL]

.. A micrometer can be used to measure the diameter of the cam at base circle and max lobe lift... subtract base measurement from lobe size to get cam lift... do it for intake valve lobe and exhaust valve lobe... multiply those numbers by 1.6 to get valve lifts, which will likely give you a good idea of the cam size... those lifts prolly match up to a standard cam of some sort... and the standard cam will have known durations...

.. A rebuilder's info would only be accurate if no one had made any subsequent changes...