Interesting. The first time that I installed my intake I used the Felpro 1250 with all four gaskets. The front seal leaked oil bad enough for me for me to want to redo it, but not so bad that I couldn't wait about a year to do it. After reading and talking to a few people it seemed that using RTV instead of using the front and rear gasket was the way to go. For me, the RTV worked much better than the gaskets. I'm sure that there is a "right" way to use the gaskets and make them work. Also, my intake is a Edelbrock Performer, not a TrickFlow so there may be a difference there as well.
The big difference that I can remember between the 1250 and the MS93334 is that the front and rear gaskets were rubber on the MS93334 and regular gasket material on the 1250. The gaskets between the head and the lower seemed like they were about the same between the two types. I do remember people saying to absolutely not use the rubber gaskets on the front and rear. Maybe they are ok for the stock lower?