Duster engine install w/ TTI's
As mentioned test fit on the stand first. If you have a scattershield it may require some massaging.
I'd leave your headers in the shipping bags, start slowly dropping the engine and adjust as necessary. I've put a bunch in both Dougs and tti with them laid in. It's much easier than going from the bottom after it's installed.
If you have the exhaust studs in each end of the head, good luck... it's not going to go well and much more difficult.