I'm re-doing a 235.Using FEL-PROs master gasket kit.Limited info on the rear seal helped me install that. Trying to button up the oil pan.2 sets of cork seals included,found the correct long sides. Now the ends, 1 set cork,the other rubber.After placing the long sides in position on the block bottom,the cork fit flush against the top of the cork, but must be jammed into the groove. The rubber fit in perfectly but have these short tabs that interfere w/the cork and something needs to be trimmed. What am I supposed to see as a correct install?