err...............is the slayer not a standard revo 2.5 chassis ? (thats what i assumed).
If you are looking at getting a revo 3.3 chassis, the extra 33mm up front will allay a lot of the wheely potential as well as aid stability. Also, you would need a longer center front driveshaft to suit. Is it worth it ?? well as far as i am concerned, for my needs, YES, it IS worth it. Whether it is worth it for you, is entirely your decision.
Sway bar kits.......My experience tells me that they DO WORK. The vehicle that they are fitted to stays flatter through turns allowing greater speed to be carried. The side being pushed up under load will transmit through the sway bar and lift the opposing side (not by a lot, but enough) thus keeping the vehicle "flatter" and more stable, although that depends entirely on sway bar diameter and shock oil & shock spring setup.
Some other things to possibly look into would be;
1) fitting a centre diff (although that too would stop the wheely factor i would imagine)
2) Rear brake kit (More stopping power is always good)
3) Rear upward travel limiter to stop rear end lift under braking conditions.
4) Stiffer front shocks and thicker shock oil to help allay nose dive under braking conditions
5) Stiffer Rear shocks and thicker shock oil than front to help stop rear end squat under acceleration.
6) Rear wing Kit (This helps protect the rig during roll overs, especially the engine head).
Other things i "personally" recommend are:
1) Fuel Filter
2) Manual glow plug igniter rather than any onboard glow plug igniter system.
3) Tiger drive starter or similar in place of the standard roto/EZ start system OR, a thunder tiger pro 21r recoil starter unit and OWB.
The t/tiger pull start unit is a lot more reliable, better designed and more able to cope with the starting of the revo .18 (2.5/2.5r) or .20 (3.3) engines than the stock pull start unit is.
I have one fitted to my 2.5 and its the best thing i have ever done to my revo !!!
Hope all that helps you.........................
As to the slayer thing, i'm used to flipping rigs, i did my apprenticeship into R/C flipping my buggy back onto its wheels after running at least 100 yards or more. That kind of thing tends to make you learn to drive better and avoid the running where you can help it. A handy trait when you leap from a buggy to a truck.
My tendency is to push each new rig harder and harder through corners until i flip it in a turn, then learn where the point of balance is for speed (by backing of the throttle a little at a time) in such conditions and tailor my driving style to suit.
No longer do i regularly flip a rig unless it is to test a modification, or if it can't be helped with the terrain i'm running on at the time.
Revo to slayer ?? Should be interesting................. a slevo 3.3, now there is an idea you can't help but admire................. (Slevo = Slayer & Revo combined)
Still looking at the revo 3.3 to slayer 3.3 conversion........
Slayer 3.3 = A Revo 3.3 chassis with slayer arms, shafts, pushrods, wheels and body (If i can get it to fit)...