An odd question but maybe not. These forums have a variety of different categories based on engine: 385, 335, FE, etc, etc. Does my Navi engine qualify as a 5.4 Modular? I'm guessing the blocks and reciprocating assemblies are the same but heads and induction substatially different. Also, I guess performance tweaking is also different considering that breathing is a significant contibutor to performance.

I see BigMatt was kind enough to alter the Expy forum to be Expy/Navi (not at my request but it did occur shortly after my first posting) and was wondering if the 4.6/5.4 forum is sufficient.

 

I should have guessed, 'typical' Navi owners wouldn't get their hands dirty, would be interested in performance, and would pay for any troubleshooting needs.

 

It is a Mod motor. Modular comes from the block design with inserted cylinder bores I believe.
Jimmy