OK guys & gals, calling on the brain trust. Looking to buy Lord Mounts for my Thunderbolt YIO-360 M1B on my RV-7A with new engine mount and new nose gear. All the research I can find calls out for the Lord J-9613-40 or -49. Lord catalog says that the -40 and -49 are identical but there is a $50 difference in price. My research doesn't include the new engine mount, but I'm assuming it is the same. These things are a fortune, so I don't want to make a mistake. Thanking you ahead of time for helping me out.