need help quick timming

i have a 87 b2600 carbed and its outa time it back fires out the pipe and the carb not same time its like carb carb carb then the pipe i think i have it in time i think i had it at tdc and then then im prety sure i had firing order right

1342
and piston order 1234

pull the plug from the number one cylinder and stick a screw driver in it(but not all the wqay in.... just a couple inches, or let the hadle stop on the head... DO NOT LET IT GO ALL THE WAY IN!!!!!).... turn the crank (by hand) till the cylinder is all the way up (it will push the screw driver out of the hole).... this is called top dead center.... now pull the cap off of ur distributor.... the point i believe should be facing the 9 o' clock position as ur at it from the driver side of the truck.... also if u have done anything with the timing belt, while the engine is at top dead center, the came gear should be lined up a certain way... i think the is a small tab on the head that needs to line up with the A on the pulley.... or an arrow... hmmm.... i dont remember that part... all of wut i have said is in a haynes manual or a factory service manual..... i might be a lil wrong cause i havent timed a b2200 in like a year or so.... hopefully i helped a lil bit

oh yeah... number one cylinder is closest to the fron tof the truck

ok well i have timming chain not belt and i have all that right im prety sure but i will go check

even if you have all that right, if the valves are not opening at the right time, you'll still be out.

read this article, it explains it better (note, not for sure if it's the same on a 26k as a 22k..)

i still need help i don't think i have cam to bttm timed right im so confussed the b2000 and b2200 was so mutch easyer i have rebuilt many of them