I use the 3M super 90, lightly scuff the area to be glued for a good bite, then mask off twice the area of the speedster you think you will need to protect.
I set the forward edge of the vinyl 3/8" of an inch under the windshield frame bottom then pop rivet the frame into the pre- measured location the cowl.
Run a hair drier over the entire piece to soften the vinyl so it can be worked easily. ( Doing this out in the sun causes the vinyl to become too soft and will stretch as you work it.)
Spray both the dash and the vinyl being careful not to saturate the vinyl with the adhesive, a light coat on the vinly is better than a heavy coat.
Working the vinyl from the windshield frame, start on the passenger half of the dash and glue it into place, you'll find that as you work the vinyl around the concave sides of the dash brow, it will tend to lift from the dash, heat this area of the vinyl with the hair drier and quickly (before it cools) run a piece of tape along either side of the dash brow securing the tape on the cowl area and to the lower face of the dash, run the hair drier lightly across this section to help it set up faster.