***messed up on title, should read "gone FROM a 2.3 TO a 3.4"*** Not really finding much on this. I searched multiple forums, it's hard when I type 3.4 on here nothing comes up because it's 3 characters I believe. Anyway, current setup is E85 Teksid with main/head studs, about 22 #'s of boost, SRA C/O's w/double-adjustables front/rear, 9.5:1 Gibtecs, tuned by Malcolm. I've had it out 2 runs only, first was 10.85 @ 138, 2nd time 10.68 @ 136 (1.49 60'). Trunk mounted ice tank is definitely padding those times a little but hey it's doing its job. I'm after 9's and wanna do it in the T56. (T56 has been upgraded and it's on a 26 spline setup). I recently bought a Whipple 3.4 off a buddy and am looking to run about 26#'s I think. I'm putting on a 3.75 to 4# upper with a 4# caged lower with locking hub. I'd really like at least 25#'s. What I'm getting at has anyone actually went to the 3.4 and been in a similar situation I'm in? I see a lotta guys going to a 2.9. Just trying to make sure this is really what I want to do. Car runs flawlessly currently (knock on wood). Who knows, I may just stay on my current setup, I just want to be sure about this before I actually go through with it. I know about the 1/2 K-member spacers, I'm upgrading the feed fuel line, and gonna put this caged lower back on to try and help with that the best I can. Any insight would be awesome. Again sorry for somewhat of a repetitive thread, I just haven't seen much on this topic in the past few years. Now watch someone come in and post a bunch of links lol.