Suggestions on next upgrades?

[vex]

Alright, so I recently received my brand spanking new Turbonetics 60 series turbo as well as the Raptor by-pass valve. I'm still going to be ordering a 35mm wastegate and some flanges and gaskets for it, but I'm thinking it's about time I start ordering some parts for the modification of the car while I have time and money on hand.

My delimma comes in with trying to maintain the vehicles operation during the week while still doing upgrades on it. (basically I can't be without a drive-able car for more than a weekend) Otherwise I would be sending out my ECU to be converted to an RTek 2.0, what I am thinking is doing the following and would like everyone's input on it:

I plan on removing the stock bumper support since it's bent to hell and having an angle iron welded in at a different location (for added strength, with less occupied space). Throw some paint on it to keep it from rusting.

Next I'd plan on removing the battery and replacing it with a red top and removing it to in cabin. This will give me more room to remove the stock radiator and throw in a new (bigger) one.

I think I could accomplish all those in a day. Now I do not want to do a massive upgrade only to take it all out and apart again for when I pull the engine to do the turbo addition (I plan on painting the engine bay while it's out is the real reason--por-15), but simple things that I can do and not have to worry about.

Any thoughts or suggestions?

Alternates or ones I can do as well as those listed above would be parallel fuel alteration (but I can't upgrade the injectors yet), Rats nest removal, EGR delete, cat back exhaust (2.5" silencer and y-pipe, to some exhaust). which leads me to another question.

My exduser exhaust exit is only 2.5" in Diameter. Should I just use that all the way down to the Y-pipe or should I increase it to 3"?

(This is a 6-port Turbo project btw)