Will I be treated as an IET soldier when i ship off to fort sill as a reclass?

This will depend ENTIRELY on the cadre of the company you are assigned to for training. I can personally speak on this as I did this twice. Once in '96 when I went from Reserves to Active and reclassing from Medic to Engineer. During Reception, all of us that were reclassing or coming back in after a break or transitioning from USAR/USANG to Active...we were all separated (housed) from the IETs during Reception. Yea, we had to do some things with them, but for the most part we stayed away. We also had a lot more freedoms than them. We could go smoke if we had the time. When I got to my training company, we were given freedoms the IETs didn't have. Could go on pass during the week and weekend. Could smoke. No alcohol in the barracks but we could at the bowling alley. In 2008, I came back into service after a 5.5 year break. Again, the company gave us reclass Soldiers all kinds of freedoms the IETs couldn't have.

In your case, you will probably go thru reception and then head to the training company as a "hold over" until training starts. I say this because when I went to 12B course, I was sent to the company and was with them for about a week or so until they finished their BCT and then started AIT.

Here is my 2¢.
I have reclassed twice. First time was in 87. I was an E5 and went to Ft. Bliss. We were housed with some ESLs (English as a Second Language) did 2 weeks. Other than 2 formations per day, our time was our own. Once class started, we were considered permanent party. Only had one formation in the morning,then go to school (6 months). Of course we had the barracks to clean and maintain, but that is normal.
I exited active duty in '90, but came back in '08 (gap in service is a whole other story).
After 18 years of not being in that army, I joined the NG because I felt the need to support the country. I went to Ft. Gordon to go to 94R school. I was able to come back in as an E5 because I had gone to PLDC. I don't have to do any Warrior Transition Corse either (I guess I got lucky).
When I got to Ft Gordon, I was placed with other MOSTs (Mos-trained) Personnel. Again, we had barracks to maintain, 2 formations (am for PT, pm) per day. Other than that, we were just the same as permanent party. Even the E3s that were reclassing were treated as permanent party.

I hope this helps.
One more thing, since you are going to be reclassing, it is expected that you will do well in school and you must set the standard to the IET students when in class.
Good luck!

According to a guy I "met" on reddit who is also going 13F to sill this week... all prior service will be lumped together on the same floor in the barracks of whatever building the AIT company is at. IAW AR 612-201, all MOS-T soldiers are to be treated with the respect that goes along with their rank. You should be treated with the equal amount of respect as a cadre member, minus the stipulations that come with being a student. However, dont be expecting super crazy privileges. I expect that the main privileges we have will be cell phone use and freedom from constant room inspections. I believe we are the same class, man. I start mid-June as well. We should be on a 2-week quarantine prior to the class start date. My contact just arrived to Sill so if you want. I can ask him questions on your behalf.