Extreme Automatics is in NC for your 200 and if you must have a 350, get a BOP core. I have a guy at the Chevy dealership built mine very reasonable and I have beat the crap out of that trans for 9 years. I had to have it rebuilt when I forgot to put it high gear, I also had to get a new converter. I am in Charlotte, where are you in SC. Life lesson on my 200, when I bought my GN it had a 350 in it and I sold it to get the broken 200 fixed. $1200 and 3 months later the 200 fails and I take it and my art Carr converter to a local guy just to find out why it failed. That's all I asked for per contract. At the time pts out in CA was coming out with the billet parts for big power and I gave him the contact info. He calls me 3 days later and said that your trans was ready. Happy as can be, I went to go get it and he slapped me with a $2300 bill. I never told him to repair it, just tell why it failed. Long story short he sold my trans and converter to a guy in GA because I refused to pay, I took him to court and I hated it for the guy in GA but I got my trans back. It is still sitting on the floor beside another core just waiting for the day to be called to duty, who knows it may fail again. It doesn't have the brf valve body but I did pay to have the converter flushed and rewelded. The best converter maker in this area is ultimate converters and 30 minutes up the road from me and the best driveshaft company is the driveshaft shop about an 1.5hr away in Salisbury. There is also transmission shop signs at every drag strip, use those also for something really close to you. For a stocker a well built 200 could be had easily but you have to go with a reputable shop or you might be asking to tell your live and learn 200 lesson also. Sorry so long, hope this help. Pm me for more details or my #.