I recently acquired this 68 convertible with ac. When disassembling it there was a tank on the rear of the passenger side inner fender which had a tube from the radiator fill neck going to it. "obviously an overflow tank" But from what I've read, 68s with ac didn't have an overflow tank ! It had a bag for the washers on the drivers side fender well but it was trashed. Also what I've read is cars with ac had the bag ! Well to the point, I really don't want to do the bag thing. I want to put a fluid tank where the overflow tank is/was ! Is there any reason I can't get a later model fluid tank with the filler neck extension and mount it in the passenger side fender well ?

 

post a pic. If its the big aluminum tank you speak of, that is for the radiator on a small block. IT was an expansion tank, not really an overflow tank. If you are talking about the black plastic tank the bottom of the fender in front of the gills, that is the windshield washer tank.



you can see the wiper washer fluid tank below the aluminum tank with the siver bracket holding it




you may have to zoom in and look behind the spray bottle to where the mount would be...not great pics of the area

 

Thanks for the pics and response ......I don't know how to post pics ! This is a stock 68...327 car with ac. It had a washer bag on the drivers side inner fender. It also had a white tank pretty much where your aluminum tank is located. That tank had a tube from the cap going along the fender to the radiator fill neck/cap. I'm just going to put a washer tank kinda where your black tank is only a little bit higher. Pretty much where my white tank was ! Thanks for your input !

 

It should not have an overflow tank

 

I am not sure how many variations there were under the hood in the Fall of 1967. My C3 is number 2595 and it had no overflow tank or expansion tank. The holes were never drilled and or used. My car was built as Big Block, 4 speed convertible with Power Brakes and Power Steering and Power windows. Fairly simple Big Block setup. We found several parts that were used in 1967 up front when I had the engine compartment cleaned up when re-installing the 427. My C3 has a C.E. Engine with the stamping for a 1967 L71 Engine it was designed to replace.

When was your Corvette assembled at the Factory Rescue Rogers? That is a beautiful Corvette!

 

first week of oct 67. Ill Have to llok up the number...hold on

 

Mine is 401530 off the line. Was an L79 no nothing for power accessories with a close ratio. I guess the original guy wanted a street racer. Got a big block tri power now. Building a 427 to drop in this spring.....hopefully

 

Your Corvette is earlier than mine is by a week or two or three. Mine started life as an L71 and the engine in it now is a 427 but as you have heard me describe it before. It is a High Compression copy of the L88 427 engines. I have everything but the Aluminum Heads on this block.

Many years ago Speed Vision shot a 1/2 hour show about Corvettes@Carlisle. They saw my C3 with the hood open and immediately thought it was a Real L88 (which IT IS NOT) due to the parts I have on the engine. My car has a factory L88 hood with the wedding cake assembly used on the L88's. The gentleman who sold me the hood sent me a goody box full of 1968 L88 Parts they had left over including many parts that had been chrome plated. My engine is obviously a Big Block and has the L88 Lower base plate which seals to the hood when closed. As you are aware I am running the Edlebrock Air Gap RPM Intake manifold with the Holley Throttle Body on it. I quickly corrected the Guy speaking about my Corvette and told him it was another wanna be and that it was not a real L88. I then pointed out the easy ways to tell real from not real L88's. I saw the show on TV and it looked cool seeing my own car being looked over. It still looked great back then and now the paint is in need of some help.

As you have probably read before I built my 427 over a period closer to a year. I was in no big rush as I stuck a spare LT1 350 engine into the car while I was working on the 427. The 427 was my first big block so I chose to pay a bit more and have a professional engine builder to assist in building my engine from the ground up. It was a wise move on my part, I did learn a few things along the way as well. He was building Can Am engine for Porsche back in the 1960's and built a lot of engines used in our local area. He cleaned the block and had all the machining done then painted inside the block with Glyptol. He told me that the oil needed to be in the oil pan not slowly coming down the walls of the inside of the engine. The one thing he did that was really nice was to put clay on each piston and we wasted a set of head gaskets verifying no contact between the pistons and heads. With the compression he thought we needed to know "for sure" that everything would clear. He died of a heart attack a few years ago so I am on my own with this beast. The torque the 427's make is just amazing and I am sure you will be pleased when you get your 427 on the road. The six packs look cool but I like the simplicity of the single carburetor or Throttle Body.

I have had my C3 for 30 + years and still love to just look at the C3, they are such beautiful cars and so simple to work on.

 

I agree. I had the weding cake assembly for a short time on my small block, then when I put in the 396 I couldnt fit much with the sniper so I had to go with a stock 427 dual plane and that was the end of that. The 2 just wouldnt play nice together, it was a tuning nightmare so I ditched it an went with my first love, the six pack. Now Holley bought Hilborn and that would be m next fuel system when the tri power gets boring.....LOL

 

When I bought it a few years ago my 1968 did not have an expansion or overflow tank. I like to see what is going on with the radiator fluid color and monitor the levels so I added a clear plastic overflow tank close to the radiator on the passenger side. Easy to see at a glance what the levels are hot and cold. My car is already significantly modified so originally was not a factor.


Overflow Tank