New water pump 6 impellers whats up with that!

Well I got my 8 blade pump today and I don't like the looks of it for 2 reasons.

1. the impeller is pressed on so far it will have a huge gap between it and the timing cover so I don't know how it'd ever flow good.

2. for some odd reason the bolt holes which should be 3/8" (+ maybe a few thousandths) are big enough that a 1/2" bolt will nearly go through them. That leaves a minor amount of room between the edge of the pump and bolt hole for sealing. When installed and the bolts nearly pulled up you can move the pump around quite a bit so I don't think it'll hold a seal. The 6 blade pump is not like this. It's bolt holes are 3/8" and because of that it has a lot more room around the edge sealing surface.

The blades are quite a bit bigger too so I think it'll flow better and is the one I'll use.

The 8 blade pump has one positive note. It looks like it's a heavier duty unit with bigger bearings.

I'll take some pics tomorrow and post them if I can find the time.