ok 1. is correct, your prot timings will not match,how ever you can have your jugs ported to accomedate the stroker
2. not true... a cub is a drag setup, if your racing mx or tight trails then its a polar opposite of what your looking for so it wouldnt be better...
3. true there is a setupup for each stroke...
4. not true a 4mil 7 mil 10mil are all as reliable motor as long as you build them that way and dont cut corners.. spend the money to put quality products to insure your build is reliable.
5. true 4mil does not require case mods... 7mil and more requires the cases to be trenched
6. ummm not true but is smarter... you can always port your jugs to have the timings changed but a cub setup for a 4mil 7 mil what ever the case is ,, can be used right out of the box... most have the castings cleaned up but they are ready to go when u get them...