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Will an ef head fit onto an ea 3.9 block. Will all the oil and water holes line up? Also are the ports the same on the 3.9head and ef head or will I need to get it matched. What about the mounting studs for the manifolds are these in the same place for the two heads? Any information would be appreciated.
Originally posted by XCURSN my question is will it give any more power or torque?
I was at Brookers in Ryde the other day,they do the heads for the local dealers and Taxi's in the area. The E.B on head had better guides and over all lasted better. The latter models have even thinner valve stems lighter looking valve but don't seem to have many problems..These where high mileage heads run on LPG..
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Consideration of combustion chamber size should be looked at...
Fitting the head as stock, over the EA head will actually drop your compression quite a bit....
To overcome this, decking the head .040 " is a good idea.....also fitting the later AU head gasket which is thinner.....thus raising compression more again...
HOW much compression.....about 9.3:1 using this method....which is better than 8.3:1 using the stock EF head and standard style gasket......
Also when fitting the new AU gasket u must use the new rocomended torque specs from ford......
bang it together......GO BABY GO.....
For more bang....try an AU head....BUT u must use your cam and rockergear.....WHICH also bolt to the AU head......DONT MIX N MATCH EA AND AU CAMS AND ROCKER GEAR.....BANG-GO.....
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