I have a 1987 A stamp chassis which was essentially stock until just recently when I put some upgraded / newer parts on it from 3 ebay gold pan donor cars as well as misc. parts I bought. I have a vintage Futaba radio and servos with a Duratrax speed controller (I guess you guys call em ESC's), LOSI wheels and tires, stock 6 gear tranny and bearings throughout now. I upgraded the steering with some bearing units (I think they are RPM but not sure). I also upgraded the dog bones in the back and have a fresh new 1800 maH ni-MH battery and a different pinion and gear than stock, along with a 'race prep' Lightspeed brushed motor.
No idea how many teeth are on the new pinion and gear, nor do I know how many turns are on the motor (its a red label if that helps). I have a vintage stealth tranny on its way from ebay as an upgrade to the stock 6 gear unit as my understanding is that the stealth is more robust.
The car is faster than it ever was stock but now that I've taken it to another level, I am getting greedy and want even MORE SPEED!!!

SO...here is what I know I want to upgrade:
1. Radio - would like to have more range with a 2.4 gHz radio setup. Need recommendations and I want proof of a quality unit, ideally with some kind of comparison or other 3rd party literature that I can read.
2. Engine - from what I've read and seen on You Tube, brushless seems like the way to go. I've gathered that a lower number means more power, is that right? i.e. 10T is bigger than 13T (assuming gearing is the same)
3. ESC / Servos - again, I'd like to know what's good and would work best with #1 above.
4. Battery - If I understand correctly, LiPo is the way to go these days for the most power and longest lasting batteries. I would need a new charger for this so please let me know what works best, and how to identify the correct batteries for my needs.
What I can tell you is my gold pan runs flawlessly and that I now have a box full of spare parts (tires, shocks, pan etc) so I'm not shy about buying the necessary parts to keep this thing going. As much as I like the newer cars I just love my gold pan and can't leave it. I did also buy a mint one with a new body so I can build a shelf queen eventually

Thanks in advance for any replies!