I have an RV-8, and a high time IO360A1A and I am considering replacing it with an IO360A1B6 due to tired cylinders. Lycoming says the dimensions are the same for the two engines except for the length. Lycoming tells me the IO360A16B is an inch longer. Lycoming cannot tell me if the inch is in front or behind the engine mount attachments. If anyone has made this swap, or has any ideas, please let me know. Thanks, Jwsllrs