Have you taken a good look at the heads on the van? Are they iron or aluminum? I have seen a lot of guys at the track who have put some serious $$$ into their tow rig motors.

You might have come across one of the ones that are built well enough to need 30# injectors. If they built their race engines, they would probably know the right injectors to put with the tow motor.

Another consideration might be that the injectors are made by a different company that uses red for their 19# or 24# injectors (FYI- that last thought is just a wild stab on my part , I've heard that Accel's 19# injectors are bright yellow )

Brian