i put my 28 cyl. on. wow !!!! ported it myself. no base gasket, used ultra grey permatex, no problems so far, ended up w/ .020 clearence, 2- tanks broken front center dog bone, still on my first set of plastic gears, i have 2 sets of steeles on the shelf, both ratio combos from redcat, i will run them plastic till they go, alot of metal fillings comming from the ring & pinion, also both pinion diff bearings spinning in the plastic housings, this thing will spin all 4 on tar, also i used aluminum picture hanging wire for limmiting straps, w/cable crimps, drilled a small hole in my lower control arms amd ran them up to my body mounts already had extra holes, all aluminum parts,: