Hmmm, interesting as I dont recall having that problem... Pretty sure part of the engine mount, or something like that usually blocks that hole off? I cant for the life of me remember what, but I'm sure there's something that goes there for the MR2, hahahaha.
P.S. This thread
http://www.mr2.com/forums/beams/Toyo...oable-yep.html
Might be of a little help?
Apart from the dipstick being a PITA to get to, and the rear water outlet needing changing, it's mostly smooth sailing apart from wiring.