That is not an engine block # That # is the fireing order on a Chevy engine. You must have gotten that # off of the intake manifold. Sorry we can't help you.
the firing order for a 1998 chevorlet 350 motor is 1,8,4,3,6,5,7,2 clockwise on the distributorAnswerAll small block Chevy V8's are 18436572
18436572 Small block firing order
18436572
18436572
18436572
18436572
18436572, clockwise.
18436572 clockwise
18436572, taking as number 1 cylinder the foremost front cylinder of the engine block
18436572
motor #3978010
All small block chevy's standard firing order is 18436572.