90 Suburban timing

Need the firing sequence for a 1990 GMC Suburban 5.7. Any help Appreciated.

look on the intake manifold it should be there some where around the throtlebody if you cant find it send me an email and i'll look it up

No markings whatsoever. Looked everywhere. Still need firing sequence. Desparate!

1-8-4-3-6-5-7-2

//2000CAYukon

Thank you very much, your a life saver.