i have an oliver 535 combine with a chrysler V-8. i was told when i bought it the original V-8 was removed and replaced with one from a 545. i need to know what the correct firing order is and also what the valve clearance should be for the intake and exhaust. the tag on the engine reads that it is a type IND-318A and the serial # is 117360C. i would also like to know what year the engine was made if that is possible. thanks a bunch if you can help.