I'm running a Crower 34416 (284/284, 0.491/0.491, 114 LS, 110 CL) in the 408 that I currently have in my '89 W150. I would describe it as a little on the mild side but, makes great power from about 2,500 - 5,900. This is in a 9.6:1 magnum engine with RHS/Indy MA-X heads (1.92/1.62 valves...not my choice but hey, I got one HECK of a deal on a complete engine). Currently just running a Quickfuel 735cfm carb on an airgap intake. Yeah, I could have went with something with a tighter centerline for a carb engine but, with the 114 I don't have to worry about vacuum for the power brakes (pulls 19+ inches), it idles down to 800 rpms without a problem, and should work great if/when I decide to go with injection. Pinged a little with 87 octane but, haven't messed with the jetting at all and currently using a stock distributor. For now, I don't mind running 93, just for peace of mind. Pulls a loaded 20' enclosed trailer without ANY problems! The only real problem I've had...the 9.25" 3.21 rear end didn't like the added torque when I starting playing with the go peddle. LOL! Changing over to 3.55's and a solid spacer in place of the crush sleeve.
