Front oil seal leaking

[468chvy]

First off, awsome sight, have'nt been back here for a while, nice job, keep up the good work, anyhow, my 67 has a 468 that was rebuilt, and has always had an oil leak, I dyed the oil and cleaned up the underside, drove it and pinpointed the front seal, I replaced the seal 3 times same results, some one said the big block had a oil shield from the factory that prevented oil being blown at the seal, I don't remeber anything like that, so any ideas or help would greatly be appreciated, Thanks, Nik