FWIW, several 'mild' engines we've had in cars that we took to a bunch of T&T sessions always seemed to like spacers. I had just a magnum 383 in my Coronet at one point and I had 2" of spacer on top of a torker intake and that was faster and if I had had any more spacers and longer bolts I still think it wanted more. It's cheap to experiment with. I whittled 1.25 seconds off the ET on that combo doing little stuff like that - biggest thing I did to it was put the torker on vs the OEM HP intake.