Currently running a fvp, which is just a gmb, and it works great.
I've been running the aluminum GMB pump (1301280AL on Rockauto) on the 455 in my '72 Bonneville for about 5 years now with no problems.
I have 20-25k miles on a GMB pump now and it hasn't leaked a drop. We'll see how long it goes, but so far I'm happy with it.
Me and various others I know have used GMB water pumps before with no issues.
I been running a Gmb pump for couple thousand miles now. Super cheap on rock auto, they also sell a high performance one. I bought both
I usually use rock auto and get the gmb outlander pump.
I checked the old water pump and took it out by removing the front plate of the engine... The old water pump moves fine but it does make a squeaking noise and is quite old however it does move.
GMB is a decent pump.
I put in a GMB in my '02 two years ago, and it's leaking already.
I replaced both mine and my dad's with GMB. Mechanic recommend it too. So far so good.
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