Welcome from Finland,
Your right, not so everyday projects you got there.
4.2L LQ Kenny on 5.8L engine, or how it will be? Will be enough big for sure.
I build one with 572 Hemi, also with direct fit throttle body.
Take a look:
http://www.cardomain.com/ride/383724...harger/page-22
Post on project section when you get started..
I'll start my own hopefully also: 4.2L LQ on 8.3L Viper motor