Been a while since I have visited here but wanted to let those who are following this thread know that I installed a Pro Flo 3 system on one of my vehicles last year and am working on the Pro Flo 4 system currently. Anyone contemplating the small block version BEWARE that the intake manifold does not fit in the area of the distributor and needs to be modified or plainly put a grinder needs to be used unless something has changed in the last month or two. How Edelbrock can screw this up is beyond me. Same issue with both kits a year apart.
