I have a 70 Challenger that had a 318/904 with an 8 1/4 rear. I put in a 340/904 ( no difference) and a 8 3/4 rear. My old shaft was 4' 5 3/8" long - the yoke and is about an inch too long? Is the pumpkin longer on the 8 3/4 or should this drive shaft work? The shaft on the yoke is all the way in and it sure came out much easier.