NCHROME:
I have a US41 on a TFGS Mustang......With the stock muffler and carb, it is left wanting...I changed to a B&B muffler, and a #144 walbro carb, and it is giving satisfactory performance... Turns an 18-10 APC about 7300 , and an APC 18-12 about 6800.. Does everything you'd expect a Warbird of this size to do.. It also took some breaking in....Another option is the Brillelli line of engines, their 40 will outperform the 41, and the 46 will match anything in that class... They sell for about $350 with EI....