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rotorwrench · 01-02-2019, 03:39 PM

If your not going to use the longer stroke crank then you may want to look for some EAB heads from 52/53 Ford to increase the performance a bit. Mercs are heavier than shoe boxes so any extra power is nice. A 239 will get better performance with those heads.

After you run it a while, you will likely want to rebuild the 255 and put it back in there. A Merc just ain't quite a Merc without the 255 crank & pistons but it's your car man.

01-02-2019, 03:39 PM	#11
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,436	Re: 8CM to 8BA If your not going to use the longer stroke crank then you may want to look for some EAB heads from 52/53 Ford to increase the performance a bit. Mercs are heavier than shoe boxes so any extra power is nice. A 239 will get better performance with those heads. After you run it a while, you will likely want to rebuild the 255 and put it back in there. A Merc just ain't quite a Merc without the 255 crank & pistons but it's your car man.