Here is my contribution;

Brings a whole new meaning to "E-Revo." Nice truck!!! Congrats.

Thanks I am going to be testing it out this weekend when I have some free time...lol

Great job! Out of all the conversions that have been done on here, I believe yours is actually the first to utilize EMaxx battery trays - suprising, huh!?!?!

When you do end up going brushless, just remember that your tranny is backwards. I forgot all about that, and when I put a sensored system in it (HV-Maxx), I ended up having to flip the diffs to get it to run in the right direction.

I just got done testing my e-revo and it gets about the same speed as the e-maxx which makes me happy for now...

Yeah, I wouldnt expect it to run much faster than an E-maxx since it uses the same motors & tranny. You might be able to gear up a tooth or two since it is lighter than the Emaxx, but until you step-up to BL power then the speed difference wont be huge. Handling and general coolness though will increase hugely...

I am planning on going lipo soon but I need to know what size or type the exv will handle?

A maxiumum of 4s. In the case of the evx you will need 2x 2s lipo batteries since it has two sets of input leads- a 2s battery plugs into each one.

I am going to go brushless soon I was told to flip the diffs so just so i get this right take the top of the diff and put it on the bottom for both diffs correct...

Thats correct

What is the purpose to flip the diffs? Does this make it stronger?

No. The ONLY reason to flip the diffs is if you are using a sensored brushless system (ie., Novak) and the motor runs backwards. On non-sensored systems, you can switch the pos/neg motor wires to make this correction.

Have you decided on a BL motor?

I am thinking the 9xl with a mm

No need to flip diffs - will work best on 4s - get a UBEC, RCM heatsink and 3x25mm fans.