Big block duster pain in the A$$

My 440 in from the top with no problems. Trans from bottom after. Mini starter. Installing schumacher headders from the top after was a royal pain in the ***. I wrestled with them for what seemed like hours before getting them both in. Think if i had layed them in place as I lowered the motor in it wouldve worked.
I do wish Id have clearanced the /6 k frame a little more where the oil pump sits. It doesnt touch but im not sure i could slip a sheet of paper between them.