I'd be cautious with the leg kick idea, particularly if you are not that comfortable in stand up fighting. It also depends on your opponent. You say he has a 3" reach advantage. The problem is that low kicks make you vulnarable to punches to your face in general and especially with your opponent having a reach adantage. And be aware that your opponent could do the same and attack your legs which you will need to shoot for a take down. There is also a psychological aspect not to be underastimated: if you decide to stand with him, although you are a wrestler, and get hit (particularly in the face), because he is the better stand up fighter, then you will later be more hesitant to shoot for the take down than you would have been if you had shot right in the first place without that negative stand up experience.
So with shorter reach and being mainly a wrestler and grappler you may feint a punch and then shoot right away for the take down. But it's best to ask your trainer as he will be more able to estimate your skills than us people here in the forum.