I need a huge favor. I need to build a crossmember for my 1966 c10 longbed I'm putting a th350 in it. I'm learning as I go and have gone backwards a bit. If someone could take a straight edge to the bottom of their frame and measure up to the center of the output shaft and tell me what that measurement is. I will be able to build one at the right angle. Thank you for any help you can give this newbie. I will really appreciate it