13B4port

ok i did an engine swap from my 84 13b(i have a 84 gsl-se) to an 88 n/a 13b. i have the 84 ecu running it. i pluged to the secondary injector holes. and i'm trin to get my 84 distributor to run my 88 engine. welli did have it running then the timing advance threw it off. so i pluged up the vacum advance. all i can get is the engine to run for about 30 sec then it dies. and it also floods easy. when i set the timing where it should be by lighning up the leading signal coil and the trail signal coil, it runs really rough. if i advacne it a whole bunch it'lll run for 30 sec b4 dying. what should i try?