Hi bruter hows it going? My engine specs are as follows. 67-289 block bored 30 over, 10 to 1 flat top pistons, 302 crank & rods,erson 504 lift 292 duration cam, early70s 351W heads with ported out exaust ports, 289 torker intake, cloys true roller timing set, hooker comp headers,pertronics dist conversion, bla, bla, bla. But I think the firing order should still be the same as any 289 or 302. My books actually gave me the wrong firing order. We got it rite after a few tries. It's just frustrating having to do it over & over again till ya get . Anyway is that enough info? Have a good day !