Originally Posted by txhatch
I'd stick to b series. K series comes with a weight penalty and some guys in echc have had trouble with k20 rods.
k20a complete 6-speed swap weighs roughly the same as a b16a (i.e. less than a b18). I think shot-peened k20 rods would hold up better than ls rods with the same treatment, given equal abuse. :dunno: