Easy to go on. These bbk ceramic coated shorty headers are a good replacement for the stock ford tubular exhaust manifolds. The throttle feels a little more snappy. I do not know if there is a ho gain. Probably very little.
I used bbk graphite gaskets. Torqued the bolts every few days. No issues.
Place of Install
Do not use the paper gaskets that come with the headers. Use the graphite gaskets. Retorque the bolts after the engine has gone through one heat cycle. Then retorque after a few days, then a week, then a couple weeks and you should be fine.