I have a 1960 buick invicta that needs a complete brake overhaul. I'll be changing the front 45 fin to 90 fin so that I can run other wheels. The only change here is the width of the 45 fin is 1/4 less than the 90 fin, so brake shoes will be a touch less in width. I removed the master cylinder for a rebuild. Its a Delco/Moraine unit with a 1 inch bore. I looked at the 1968 corvette dual master cylinder which looks like it will bolt right up to the booster. Now the catch for me is that the corvette MC is 1 1/8 bore. So the question is whether the difference in bore sizes will cause me a problem or concern. Is the fact that the booster has a 1 inch end on it vs 1 1/8 be an issue? Is there a pressure difference between the two MC's that should be a concern? Your comments will be appreciated. Thanks.