I have a 1963 C-10 frame with a 1985 C-10 front clip bolted to it was 6 cyl now 283 the bell housing bolts to the frame the 6 cyl mounts don't fit I used the mount plates from the 85 the engine seems to be high in the front if i set a level on valve cover I have to lift the back 2 inches to level out . Here is my question what degree should the engine set at?