I am in the process of building a 1939 Ford Standard coupe resto mod. I recently received and installed a 383 Blueprint engine/700r4 package on a new TCI 4 link chassis. My next step is to order a new custom driveshaft. My first question is can I take measurements without the body on the chassis? I now have a rolling chassis with the engine and transmission installed at ride height but I am concerned that the body weight could change driveline angles and measurements. Currently I have a 5.7 degrees up angle on the engine transmission measured at the harmonic balancer. My pinion angle on my 9” Ford Currie rear is 3.2 degrees up measured at the face of the pinion. My concern is the difference between the two angles. My understanding is that both angles shouldn’t be more than 3 degrees. I can’t raise the transmission to decrease the engine transmission angle because the tail shaft will hit the chassis housing so is it ok to adjust the pinion angle with 4link adjustments to match the engine transmission angle? I am assuming these angles need to be set before I can get accurate measurements for ordering a new drive shaft. Any advice is appreciated.