Instructions.. Pull the windshield and rear window and take car to a good trim shop... As stated before headliners are not for amateurs. Nothing looks worse than a botched headliner job,, Except a bad convert top install.
You can expect to pay about $300 or more, depending on what condition the car is in. Is the old headliner out of the car? Look at the headliner pictures of the '49 Packard in my project journal. That headliner was made from scratch. With the fabric and listings and installation it ended up being $700, but the headliner is wool broadcloth which costs a lot more than felt or vinyl.
scully, if camero headliners are as cheap as mustang headliners ($30) you can buy 2, use one for practice and see if you have the knack before you shell out $$$
there are web articles that cover all steps...
here's my trick to make it come out super (no sags, no winkles) at a stationary store (Staples etc) buy a box of the steel "binder clips" (triangle shape, 1" with the wire "to open" handles)......they work excellent to clamp and hold the cover over the sill or roof lip as you stretch and clamp inch by inch pulling out the wrinkles or sags.......they do grab really hard....you can stretch h**** out of the cover..... what you just stretched and clamped won't move
use them to clamp and hold all 4 sides as a trial fit with no glue to be sure all is straight.....
First gen Camaros all use bows to keep the middle in shape and all you need to do is worry about properly stretching the vinyl over the lip where you push on the plastic "U" trim. The windshield pillar corners are kept taut by pulling the material tight as you bolt on your sunvisors, pillars go over the edge of the vinyl. All four sides are done this way and the final peices to do which are the trickiest are the sail panel areas. Those span a good distance and the sail panels go into the side over top of the roof material. You definately do not need to goto an upholsterer or take out the windows though for front and back its a little tight with the tool they usual ship it with.