has anyone had their motors built on a GS400? where? and how much did it cost? (top and bottom end) i'm plannin' on goin' FI later on after i get some more parts (ie. headers, tc, lsd, oil cooler, tranny cooler, radiator, fans, etc.) and need to know where i can build my motor later 'cause i already have a lot of miles plus i wanna build later as well

 

Any quality engine shop can do the work. Just make sure to do your ho,ework on the shop first.Make sure they have experience with DOHC engines.
I think you can buy the parts from one of the vendors here.