I'm currently building a 514ci for my 26T and have had excellent advice from the Cadillac forum i posted and also have had some interesting indepth technical conversations with Marty at MTS, Marty is also on the forum under the name Nashallac.

Everyone i have spoken to have said to change out the cast pistons & conrods for forged (which i have done) then i meet up with a guy called Terry on the forum that is running a near identical setup to my engine that is running consistant 9's with his 26T except he still has the cast pistons and rods !!! the rods do have ARP bolts though.