Another idea to consider - if just you or people of your leg length are the only ones likely to be using the boat, why not move the bulkhead aft put your feet on that? It reduces excess cockpit volume & increases forward storage space.

You'll need to cut a new bulkhead out of marine plywood, or you could use thick minicell foam.

You can guestimate where the bulkhead needs to go by sitting with your feet against a wall. Scoot your seat out until your knees are bent about like they'll be under the deck. Measure distance to the back of your seat, then compare that bulkhead-seat back distance to the plans.

Err on the side of the bulkhead being a bit too far forward. You can always glue minicell foam or wood blocks on the bulkhead to make up the extra inch or three. (If you leave a gap in the padding right in the middle, you have a spot you can stretch your legs into when you want to)

Cut a piece of cardboard to approximate shape of the new bulkhead (leave it large). Glue up & fillet the hull panels (use the bulkhead in the kit to ensure proper alignment if you want - just don't glue it in place). Then try to fit the new cardboard bulkhead template. Trim as needed until it fits exactly (well, with minimal gaps that can be filled with thickened epoxy later) where you want it. Cut your new bulkhead out of wood, trim to fit, & you're all set. It's not that tough - I did it, so you can too.

If you want a boat that's built so a bunch of different folk can use it, go with the adjustable foot pegs. If you're putting in a rudder, consider the Seal Line system rather than Yakima. But if the boat's just for you & rudderless, it sure is nice to have big padded places to plant your feet rather than just little footpegs.

Have fun with your project & don't be afraid to play a little!