I was thinking the same thing, Dave. Haven't measured the depth of it yet, and I don't know what the depth of the original was. I'll take some measurements and put the old one back on and set the radiator back in to give a better idea of what I've had going on these past 7 1/2 years since I bought it. I got my stack of receipts out and found that I'd bought the new pump in 2019, and it's listed on classic parts as a 'short shaft', and that it's made specifically for this purpose. Just can't understand why they would build one with a shaft not long enough to use the spacer they provide. Like I said, if it weren't for the harmonic balancer just below it, it would work great without the spacer. But the spacer requires more length to the shaft, which didn't get included. Unless the one I have didn't use the right shaft.
