There are 2 versions of this engine with different firing orders.
The "ZZ572" crate motors
come in two versions: one with 572/620hp has a 9.6-1 CR and runs on pump
premium gas. The other is a 572/720hp motor with 12.0-1 CR and runs on
race fuels. They come with carb, distributor, tall deck aluminum intake,
water pump, plug wires and more.
1-8-7-2-6-5-4-3 (most likely your firing order)
and
1-8-4-3-6-5-7-2.
I don't mean to be confusing but the spec sheet with the new crate engine big block should have the firing order for your engine.
Thanks for using FixYa.
Kelly
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