i had a frozen lifter on my old ka-e. i believe it was caused due to oil starvation. if you are burning oil make sure you are constantly checking the oil level. once i put some more oil in, ran it for a few minutes then let it sit, next time i got back in the car to drive it had unseized and i was happy.
as for the question about switching the side the battery, ive seen it done but im not sure exactly how its done.
edit: heres a write-up on how to relocate your battery to the drivers side and run a shorter intake.
http://www.240sx.org/links/ins...x.htm