3.9Fi mods

[Anthony Bromberg <abromberg@Convergencellc.com>]

Hi all,


I'm thinking of upgrading my 3.9L Fi to 4.2L using a 4.2L crank.
This will also raise the compression slightly.  Will my valves clear?

Are there any onther engine parts that need to be changed?  Maybe
a better cam?

To get maximum efficiency I will probably need to change fuel pressure
regulator, ignition timing, air intake, and maybe a chip in the EFI
module.



Thanks