Just found a 4-hole phenolic spacer in one of my drawers...and replaced it for my 1" open spacer. My 440 uses a M-1 single plane with a 950 Holley HP. Will this spacer give a noticable improvement in low-end torque? I always heard they work better than an open design...on a HEAVY(3500 lb.) street car! Can I get your opinions and experiences on this? Thanks in advance! Randy B. BTW...the cam is a 262/266 @ .050...620 lift,solid flat tappet...converter is a 9.5" Dynamic that flashes to 4500rpm