Well I acquired a couple of L20B engines for my Kids Offroad Race car. 3hrs later I have it in and mounted with Borg Warner auto attached just got to make mounts for tranny now. Looks like a race car now with Roll Cage and motor in it. Any advise on what I can do to the engine would be greatly appreciated (never played with 4 cyl Nissan's before) I would like to know if I put flat tops in it could I still use a closed chamber head or not, will be running 98 fuel. I have also found a 4.875 diff which should help liven it up a bit although I am running 14" tyres on rear that are 690mm high so that and the auto will suck the life out a bit so, but I'm sure my 12 & 10 year old will still find it a handful. I will post some photo's of the build if I can work out how. Still need a cam as well can't be lumpy though.