Just unbolt and remove the old ones and bolt on the new ones.
I just installed HS 1.7s yesterday. Not as easy as I thought it would be but some people would say that I'm slightly physically handicap. All I done was torque them down to 30Fps and put a little a$$embly lube on them. The valve covers have to be snaked a little bit to get them out but not too bad. All in all I think they are worth it. I can feel the extra torque on the bottom end of the RPM range, which is what I was hoping for.
I just installed HS 1.7s yesterday. Not as easy as I thought it would be but some people would say that I'm slightly physically handicap. All I done was torque them down to 30Fps and put a little a$$embly lube on them. The valve covers have to be snaked a little bit to get them out but not too bad. All in all I think they are worth it. I can feel the extra torque on the bottom end of the RPM range, which is what I was hoping for.