hi, welcome and nice Eagle! hard starting may be caused by the fuel bowl draining. If it's the original carb, it could definitely use a rebuild. Lack of power could be a clogged or semi clogged catalytic converter. Since you're not using the pulse air anyway, I recommend a modern free flow cat. Those old air injection types , without the air injection, could get so hot as to catch the above carpet on fire. good luck, gz