I bought a 78 Lincoln that was parked on grass and the whole underside is rusting away. Not sure how long it was on this guys lawn, but they had replaced the brake lines and exhaust. I replaced the whole fuel line and a tank strap. Now its leaking trans fluid and I hope its only a rotted line. I'd never park a vehicle on grass for any length of time or buy one again that was.

Eric
http://s1199.photobucket.com/user/sparky234/library/My%2057%20Chevy%20Stepside?sort=3&page=1
'57 Chevy 3100 (Little Red)
'81 RD350 LC - Fun, Fun, Fun
'83 GS1100E - Pocket Rocket