The indybrocks come with a 2.05 valve if I remember right. The pinch although an issue on a stock Edelbrock can still flow over 300 cfm without moving the pushrod over. Just tubing thim and using every available square millimeter I’ve gotten over 315 cfm with a 2.08 valve. The 2.05 valve is just about the perfect valve size On Edelbrock heads became of the given available porting area. Most gain per dollar. I’m surprised the TrickFlow heads didn’t come with that size valve at least but after all they were going for the street strip guys with that head