The firing order is 18436572.
The firing order of a 1974 Chevy 350 is 1-8-4-3-6-5-7-2
A 1974 Thunderbird with a 460 cu. in. engine firing order is 1 5 4 2 6 3 7 8
18436572
15426378
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Highly doubt that would be possible, at least not for very long
the correct firing order is 18436572 have fun
Go to your local junkyard and they allow you to search those vehicles for matching parts.
Firing order for all straight six engines is 1 5 3 6 2 4.
The firing order should be 1-8-4-3-6-5-7-2.
18436572