"Do these motors have factory velocity stacks? If so is it worth trying to track some down?"
2.4 MOD VP motors came with velocity stacks. I have same motor. I removed the stacks with no ill effects.
Stacks ain't going to get ya 1000rpm they are not the issue.
Dave
1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
1988 BAJA Sunsport 186, 96 225 Pro Max
79 12' Auminum, 95 Merc 9.9
RIP Stu
"So many idiots, so few bullets"