Chevy89

ok, so idk where im supposed to post this, so im sorry if its in the wrong spot. but, my motor in my camaro blew. i had a 305 with a 700r4. i bought a 350 to put in it. but the 350 was hooked up to a 350 turbo. so, my question is, is there a flexplate out there or something i can do so i can put the flexplate on the 350 & it still hook up to my 700r4??? the flexplate for the 700r4 was 2inches. & the one on the 350 is 2.5 inches... any suggestions??? its an 89 camaro & the 350 came out of an 84 chevy truck....