I think the post may have been somewhere in "The wall hanging" thread on my car. Tom and I had the discussion on water pumps ages ago and my research shows Colvin book and everyone listing the 608 pump. however every unaltered original pic of a 1967 350 motor shows a 326 pump with bypass. I looked at origianal cars for many months before deciding to go with 326. A guy on Ebay sells them once in a while "Mrzcarb", I think. His ad for them says they are hard to come by as they were used on the 302 and high perf. small block engines. In 67 the 350 was a hi perf motor and seems to have recieved the 326 pump for whatever reason. My car came original with an aftermarket 326 pump with bypass plug. The guy who sold me the car was persistant that the bypass pump was correct for my car. My car has clutch fan and A/C but my understanding is all 350's came with the 326 pump regardless of fan or A/C. This is only based on pics of original cars, nothing written anywhere.

So what you are saying is that Colvin's book "By the Numbers" is all wrong. It shows 608 usage starting in 1965 and continuing until 1969. It clearly shows the 608 for the 350/295. Up until now I have had a lot of faith in this book. He only shows 326 usage for higher perf applications such as; Corvette, High perf Chevy II and Zs. Are you trying to tell me that someone removed the 326 from my car and installed a correct dated 608? I find that very hard to believe and will at this point remain a "Doubting Thomas"

No but the evidence is strong both ways..608 is fine and it's only 10 bolts to change out some day.. Don't worry and besides our cars are a little apart in the O-1 world.. Until Colvin nobody ever even listed the QK rear axle that has now proved to be extremely popular.. Mistakes happen everywhere.. The problem is that when you print it in a book you can't "Take it back" and people are all too willing to believe ( Phil taught me that) ...What date is your pump Gary?

For sure it will need more research. Thid is the hard part of putting these cars together. I was in search ot the correct pump for my car and feel pretty sure the 326 is correct. I'm open to any info, and my research had no written documentation only pics I'd looked up of old originals, plus mine already had a 326 aftermarket pump, plus the previous owner (who seemed pretty knowledgable on Camaros) said the 326 was correct for my car.
On the other side of the coin I also found many pics of restored cars with the 608 pump, read the Colvin stand that all 350's had the 608.
For whatever reason, and I can't pin it down, I went with the 326 pump.
Is it a possibility that some 350's came with the 608 pump, anything is possible.
What I've found is if you truly believe (for whatever reason) you have the correct part, go with it.

I've heard from Gary and Sutho: It would seem that both guys have dated and probably original 608's on their cars?
Gary has a Brass Hat styled O-1 car that does NOT follow the Festival model as we know it and has a 4 blade fan ( Not heavy duty cooling ) Suthos car is an AC job ...
I think we need to look at these two cars further to help the cause..
Sutho had a good point as well. Assuming like I have that Flint built the 350 engine with the water pump on it and then painted it orange...When they banged the vin onto the block at the assembly line was the pad painted orange and thus has the engine code covered in orange and the vin with a look of chipped paint because the line worker banged the number right though the paint? And if the water pump was on the engine at Flint then why would there be any discrepencies in pump style at all?
Could this all end up just being an availability issue and no big deal ( restorers option?)

quote:

Gary has a Brass Hat styled O-1 car that does NOT follow the Festival model as we know it and has a 4 blade fan ( Not heavy duty cooling ) Suthos car is an AC job ...

Great point! We have already established the fact that the first 60 or so Pace Car replicas were handled differently. I bet somewhere, in some age old Chevrolet Service Bulletin or in a Intra Company mailing, there is a mention that the 326 was the best for the small block application for heavy duty needs. If this is true, I bet ya' it was requested to be fitted on the Pace Car replicas.

i have double checked the pump, looks like it has not been removed at any time,i have a 5 blade fan, the area where the engine # is stamped has not had paint.

LA built smallblock for disussion ( Mike Rossi collection)

So this picture should intrigue David parr for sure . I find a few things interesting. The clutch fan is a great confirmer and has a stamp of C? on it. The radiator hose is the type that has the thin yellow stripe down the length. Some bolts are obviously bright silver cad and not just all black oxide. I need to spend more time staring but that looks like a 326 water pump. The hose nipple is BRIGHT silver. The alternator pulley is gray phosphate like mine. The crayon markings on the head are big, bold and lumpy like a worn out grease pencil makes! Can anyone explain to me how this engine is being supported? Maybe the trans is on it? I see no lifting brackets and the carb is already on.. One engine even has the power steering lines attached to the pump! I'll try to get more of this picture to post with correct resolution. The five blade fan interests me. The general look of the engine I must say is much brighter and has a look I would have called any restored cars engine "over restored" I can email the original to anyone that wants it so you can truely appreciate the shot.

Yes Tom , please send me some copies of this engine. Just press down on the fan belt and turn that blade out of the way so We can see if it has a by pass plug.
As much as we like to sort these little items out, if a guy has a correct dated part and feels it is original, then hey it probably is original. There was no supervisor standing there when they added these water pumps daying pull that off and add a 326, or whatever other # pump came on the cars.

Send me a picture.

Well guys, I'm still standing my ground on my water pump. I realize that my 0-1 car is not the "model", it is a Brass Hat. But it has a four blade fan and a 608 pump. No doubt there. I also looked at a Blue Topper at Camaro Specialties today with an all original 350\295. It had the original water pump and fan on it. A 608 with a four blade. Your cars may be different but mine will be a 608.

Gary, tell more on the car at Camaro Specialties.

608 is a good pump and will keep your engine cool.

If you are happy that is what is important!

Phil

OK..It looks like I've fallen for it again...Isn't there supposed to be the thingy for the carb spring on these 660 necks? I see evidence that the one on my engine was ground off..Man O' Man
Well at least I figured it out BEFORE I installed the 326 pump and removed the incorrect engine pulls and repainted the motor