Have done the same myself with both spoilers, but swapped the rear for a 69 TA a few months back and am happy with it. Kept the camaro one as a back-up cause the paint matches and it fits perfect.

Use that front kit, my friend! Use the rods and the new hardware, the **** thing flitters around like paper at over 80 MPH without the rods, so use them!
Also agree with 68 BLKBRD, if you don't want to drill you can find good adhesive tapes to hold the rear spoiler down, not nearly as much force or pressure on the rear spoiler. I made the mistake of drilling and had to get a new trunk lid when I converted to the 69 TA spoiler. If I'd used the tape I could have cleaned it up and used same original trunk for the new spoiler.

Nothing wrong at all with getting these two inexpensive snazzy pieces first, cause the "money-pit" will beckon for much more down the road! Oh yeah, just you wait.