Hi SNKBTE
Are you using the Corvette foot or the Holden foot on the drivers side. The Corvette on side have a cut out on the front most face where as the Holden on does not. I had the same problem and pick up a new foot from Eagle Auto Spares for around $160. Both the left and right hand side should look about the same.
Hope this helps I'm going through the same sh*t with
oil pans.
Cheers,
Dale.