I can get the top end of an L 67 (from the heads up, including everything to fit it to my N/A ecotec) For $700, (yes that includes the S/C) I have heard 3 different stories,
*1.... Crank, rods, pistons are different and the cupped pistons lower the comp ratio....
*2.... bottom end identical to N/A however heads different to lower comp ratio.....
* and 3.... Nothing is different, S/C bolts straight on and no changes required....
Now i know that the 3rd option is a load of crap, coz the L 67 has a lower comp ratio than N/A.
The guy im buying the bits off said that the bottom end is the same, so if i put the heads he supplies on it there will be no risk of blowing bits up..... I would like this to be true, but i could live with just spacing the heads a lil bit.... I know that spacing them isn't ideal, but one of my mates from work ran 13psi on a standard proton 4 cyl engine with just a spacer between the head and block and it worked fine.....
Discuss!