I'm trying to get the wifes 62 up and going but the 230 is giving me some issues. H have installed a Offy intake Holley 390, HEI, stove bolt header and 2.25" exhaust with 18" glass packs. First it stumbles going off idle (I do not have any intake heat set up right now) I have moved the timing around, finally setting with a vacuum gage (along with the car it settled in a 20")this has helped but I get some horrible back firing out the exhaust (during acceleration and sustained RPM), if I hold the choke 1/2 closed it get quite a but better but not perfect. I have adjusted the valves, that help quite abut too. Everything I have done has helped but I'm lost now. The firing order is correct 153624.
Thanks
Jon
