I've been working on my older T-MAXX'S , since I changed the engines out of my Savage's. So, here's what I 've come up with, I think I have figured how to mount the engines. I ended up moving the trans up one hole. Then change the drive shaft's length. I had to clearance the chassy for the disk brake. The pipe was trick, but I think it's going to work. The other one I'm still up in the air!! You got to love this hobby!!