i have a 1991 prelude with bent valves from a broken timing belt.
and i was told it's more cost effective and easier to buy a used engine
with a 9 month warranty. well the question is the b20 interchangealbe with
the b21. or do i need to alter the car at all for the b20 to fit?? why would i
ask cause i dont wanna spend an extra 200 dollars for an extra 100cc i could
tell i had or not.