Any tips or recommendations on header install on '74 Duster

My '72 has '74 K-frame in it and I installed Doug's long tube headers quite easily. Hardest part was not marring the finish.

Jack up motor just enough to clear ears on the K, slide over to passenger side (loosening the trans isolator can help but wasn't needed for my car. The drivers' side came in from the bottom.

Lay it in there, and slide motor over to drivers side, drop it in from the top. I never even pulled the oil filter.

Hopefully this helps?