BBC
1 2
3 4
5 6
7 8
SBF
1 5
2 6
3 7
4 8
look at the above examples and Ill tell you what happend to me once, My dad was building a 402BBC, well this was "top secret" and I didnt even know about it untill dad called me up and ask me If Id adjust the lifters on a solid flat tappet cam he had just installed, well, when I got there the motor was on a stand and he had refreshed the 402, so I started going through the valves right, well, I adjusted #1 and was going to go through the firing order, I said now whats the firing order? and quess what? he had assembled the shortblock like the SBF example!...hahahaha!
I had to tear it down and do it again...He was in such a big hurry (for a local track gathering) he made a big mistake, we made it and posted some really good times in the process, and we build 2 or three motors a year and it just goes to show a quick throw together is never a good idea, and aside of putting a 327 crank in backwards once, I cant think of a bigger mistake that what happend to us, so......we live and learn..