I am in the process of building a new engine for my 55 TBird.  I never want to take the engine out of one of these cars again. It's not something you want to repeat.  I am ready to buy a new cam.  At the moment I am vacillating between an Isky E400 and one of John Mummert's cams.   He has a new cam called a 1957 Plus that sounds interesting.  My question is about lifters.  The price of Yblock lifters is all over the board.  When I call the suppliers I get vague answers about where they come from.  I want the best lifters possible because I don't want to eat up a cam.  I always use lots of moly lub on my cams and break them in properly.  I also use the correct oil for a solid lifter cam. How can I make sure the lifters I buy will hold up?