ahhh. the old conversion thingo.... just did mine from 202 to 308.... i have an 83 wb as well with windows... read your problem with filling in the windows... apparently you have to be very lucky to find someone who can do this w/out warping. Re the engine, i did see a few on ebay not so long ago, not that badly priced either, but on the east coast. What transmission/gearbox u going with?