I have 4.5 mid eyes from Opentracker and they didn't increase the ride height. As already written, the shocks are important too. I run Bilstein shocks on all corners and I am super happy with them. You can call John from opentrakcer and discuss with him what you want and he can help you. SaT will most likely do the same.
Installation is very easy, IF the leaf spring bolt in the front comes out. I would start to soak both bolts asap to make your life easier. I had one very stubborn bolt and I can give you some recommendations how to remove the bolt if you run into problems.
1966 Convertible (Plant: San Jose, CA)
289 2V, PS, AC