I just installed my new Holley Systemax 1 lower. I may be wrong but I think I lost some lower torque. I have not driven the car because I am restoring it since I bougt it 5 months ago. Has anybody installed one and experienced the samething- loosing lower end torque? The ports looked good and I used a air gun and all the ports sounded the same except 1 and 5 where there is a little dog leg. But the ports were way better than a stock lower. I had a extruded honed stock lower on my other mustang and I notice a change. And the port sizes looked the same. Or is it just me. It's a stock engine.