It?s worth the trouble
The Barrett setup gave me 30+ MP on takeoff roll at 600MSL with the Airflow 300 and 9.5 pistons. You’ll need to roll the exh system outboard a bit at the cyls, and make what it takes to the belly. Figure on a custom air box for the bigger fuel controller. Get in touch with Rozendahl about his setup - I had it way back when, but he has more hours on it than I did. Trust his recent numbers more than my memory.
I don’t know about the performance of the others, but Red Bull used the Barrett parts when they were still racing. That means something!
Or - you could sell the LYC with prop and put a TCM 550-N on the nose..310HP right out of the box, and 325 with a couple small tweaks.....340 with pistons...about 10lbs heavier, and very smooth (4 counterweights). Hoo chee mama! And - the 550 comes with Cold Air.
Check the price of used engines in Trade-a-Plane and other sites.
550 engine mount, exhaust, and cowling available - just bolt ‘em on! Heh-heh...