Don't read if you're close minded

when i put the 440 in my 65 dart i borrowed a 750 vac holley til i found a carb. my mate needed it back and with money tight i bought a cheap 600 vac holley. the car noticeably nosed over as it got close to 5000rpm. however it was smoother and much more responsive up to that point, oh and a lot more economical which helped as it was my daily.
neil.