get creative under the hood bro. IMO stick to visual some small perf upgraders.
engine work will be REAL expensive since there is NO EASY way to tune it. plus a car show person has NO IDEA.............whats inside. SHOW ME SOMETHING.
if you venture over to other forums like LX, you'll see plenty of decked out 3.5L sixes.
this is not a great shot but here is my 4.7.
So I have 6 BT blue covers, Body color: K&N tube, SRT8 strut bar, Coolant Tank, Windshield COWLS,SRT8 grille insert. Remove some of the OEM stickers.
I have seen painted coils. Painted Rad shrouds, fuse boxes. Painted Intake Manifolds.
Add cool hoses and clamps. Im sure in a few minutes I could help you ruin the budget fior a few years coming.