Now the 331’s break-in is now going to be N/A (3 Mo. 6-71 Blower lead!).So, up CR to 10.3 w/small Ch 56cc TrickFlow 11R 190’s, Lunati S.Roller Cam, Systemax. Love the Victor, Jr EFI Intake’s! Throw a Carb on, use FI ports as DP NOS inj, or OE’s EFI using a 90’ on the flange with a TB & CAI..OPTIONS!