I used the pivot and fork that is referenced in the first picture. That is the setup that was recommended to me. It serves me well at the strip and is bolted on just like you did with your spring type.
My fork also seems short, even though it was from an 11" Ford bellhousing. I solved this problem by notching excess material off the bellhousing. My notch is about 1/2" deep and 1" tall. Be sure to take off enough or your clutch linkage might snag it once in a while. I have used this setup for thousands of miles now and 80 or so runs at the track.
You can just barely see the notch on the lower left of the Lakewood--I have since made it a little larger since then.
Hopefully you tested your headers too as the Lakewoods normally need some notching by the starter:

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Dennis
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65' STANG (3330 lbs), 393W NA, Toploader 4 Spd, 4:11, AFR 205's, Vic Jr. Intake, CI Custom SFT, 750dp, 11.0 CR
11.25@122.19mph