One piece rear main seal oil pan

Im building a 350 for my 80 vette. It is a newer block which uses a one piece rear main seal. Ive been looking at oil pans and am not quite sure which one to go with. I need to be sure that ill have proper clearance when i install the motor. These are two that i have been looking at:

http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_761615_-1_10457
http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_745568_-1_10457

Its the first one on each page. Does anyone know if one of these will fit properly or is there another one that will fit? Any help will be great.