Well they are off! Used a block of wood and some tire irons and they popped right off easily, after a few good whacks. And this is what I found.

GOOD-Some carbon ridge-albeit not all of the way around and just a very slight wear ridge. No major scoring, although there is one spot that can be seen and just barely felt. Standard bore, clean piston tops-more or less and Ford valves in the heads. Not bad for a sub 50K engine.

BAD-some sludge, not much and it will get cleaned out when on the stand. some scale and goop in the antifreeze in the water jackets. Rust on some valve heads but I think that is from sitting in the yard.


Overall, she is in pretty good shape. Next up is to see what the bearing look like. What do you all think? Passenger head/block and then driver side head/block and finally #6 before scraping and after.



Mike






   

     

471 cylinder heads (most likely from a truck, 1958 -1959) late model push rods.

Well Crap, now I don't know what to make of this motor. I did look at Y-block guy's website and found my head casting numbers and yep, they are for a 2 bbl truck car low comp engine. So...someone at some point did rebuild this engine for some reason. Time to see about massaging these heads or look for the correct ones. The next step is to look at the bearings this weekend.

Mike 

Just looked at Tim's site and they have the same valves but just a larger combustion chamber. I wonder if Steve can just shave the head down to match the ECZ-G head chamber?

Mike

The nominal combustion chamber size for the ‘471’ heads is 82cc.  That’s 10cc larger than the ‘113’ heads and 13cc larger than the ‘ECZ-G’ heads.  The 471 heads would need to have their decks milled at least 0.060” to get them to a 72cc size assuming they are 82cc now.  The heads really do need to be cc’ed before doing any cutting just to see what the starting point is as they can be easily larger than 82cc if never been cut on before.
 
One fix for using the ‘471’ heads so that they do not have to be milled excessively is to use a piston with a 10cc dome.  Going even larger on the dome size could even be beneficial if trying to get the compression ratio in a more suitable range.  Using the domed pistons would eliminate having to mill the heads excessively which also can cause some intake manifold fitment issues.  Keep in mind that for every 0.010” that the heads are milled, the intake sides of the heads need to be milled 0.014”.  There’s not a lot of room for milling on the intake side before getting into the valve cover flange at which point the intake side has been milled as far as it can be cut.  If needing more, then the intake would need to be cut.  There’s some leeway with the intake sides being milled if using composition head gaskets but this gives you an idea of what is going to be involved.

Lorena, Texas (South of Waco)

There’s another fix for the 471 heads. I’ve got a set that Mummert ported, they work nice on my F code clone. Just add a supercharger.
LOL.

miker
55 bird, 32 cabrio F code
Kent, WA
Tucson, AZ

ECZ-6015-C is a 1957 292-312 block. The dot on the C/S identifies the crank as being 312. You need to verify main caps as someone may have cut a 312 crank into 292 block. A set of correct heads (non-posted) should be readily available.

The CARB is a FORD 4100 4V with an electric choke of all things.

____________________________

So, since this engine has been opened-at least on the top end so far-it has become a Frankenstein motor. Not that that is bad, but just not what I was hoping for. I checked the numbers on the block, heads, exh and intake manifolds and I get different years. This is what I got:

Block= ECZ 6015C=292/312
Exhaust manifolds R=B9AE, L=EDB (58-59 292 manifolds)
Water outlet=ECE-8/3
Intake=ECZ-9425-B

So my guess is this, the engine is a genuine low mileage 312 (well at least at this point in time) that went to the fairlane I got it out of. But at some point the heads and manifolds got replaced along with the valley pan. The only reason I say this about the pan is that it was designed with a PCV valve in it from the factory. It has a stamped indentation where the valve sits so I don't think it is a later mod.

Mike

Got the valley an oil pans off, not to bad. It has 312 caps🎉🎉. Some sludge but not too bad. So as long as the bearings are good, I will regasket her and button her up.

Mike

1958-1959-1960 Mercurys had a 312 Engine (standard equipment) with 471 cylinder heads and a 2bbl, the blocks were  ECZ or B9AE. look for a casting date on the block that will help.