longbed driveshaft

[50bomb]

Read alot on other threads but wanted to know from the guys who are actually running this setup or close to it what they think. I have a 1965 c20 with original 283/3 spreed on tree. I am having a hard time with finding correct center Ujoints for my 2 piece drive shaft. I found a one piece for sale from a guy locally who sells 60-66 chevy truck parts. Says he has one exactly what I mesured. Its about 75" from front to rear and 80" with transmission yoke. Anyone happy with this setup? I know people say this and that but I want to know who actually has experience in knowing this personally if its good to go.