K Smith wrote in message ...

& she won't if they're "based" on that 270 HP 6cyl GM engine which I
think they are.

It's easy enough to check.

http://www.gm.com/automotive/gmpower...ehicle/ll8.htm

4160cc, BxS 93.00 X 102.00mm.

http://www.mercuryverado.com/pdfs/Product_Specs.pdf

2598cc, BxS 82 x 82 mm

First one has bore and stroke sized for more low end torque, second
one is for getting HP at higher RPM.

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