I don't think you'll fit my leathers -- I weigh in at about 170#. The length would be fine, and you're welcome to visit the SSS pit to try 'em on.
But please don't do what some racers from a foreign country did last year when they borrowed mine. They took 'em through inspection and carried them with their equipment for most of the week. The rider wore his own (non-SCTA compliant) leathers for runs. Evidently he managed to get away with keeping the starter's eyes off the little button on the shoulder (the button proves they do meet the specs). Nancy and I were at the line Thursday or so and were looking for the leathers, figuring that if we didn't get them back - they might go to said foreign country. The name of the country I won't tell you, for the sake of confidentiality, but it rhymes with Spitaly.
Anyway, we got to the line and saw the guy(s) - ready to make a run and wearing his own set of protective garb. By the time we got close enough to him to question him - he was leaving the line, so we didn't have a chance to ask the starter to give a second look for the button.
Be legal -- safety is cheap.