M90 is bigger DISPLACEMENT, not actually physically bigger than the M62.
Torque and hp are a product of the boost, which is controlled by the pulley size. We will be sizing the pulley to boost 5 psi, which is mild.
Doesn't get any cheaper than this:
http://cgi.ebay.com/ebaymotors/ws/eB...3AIT&viewitem=
Rob