What is the firing order of a 351 Modified in a 1977 F-150?

Answer 1

Answer

The firing order of the early 351W engine is different from the late 351W engines. The early 351W�s firing order is 1-3-7-2-6-5-4-8, while the smaller Windsor engine�s firing order is 1-5-4-2-6-3-7-8. What makes this interesting is that 289/302 cams are completely interchangeable with 351W cams, providing you match the firing order to the camshaft. If a 289/302 cam is used in a 351W engine, the firing order must be changed to the 302 sequence 1-5-4-2-6-3-7-8 by moving the wires on the distributor cap. The same procedure is used if a 351W cam is used in a 289/302W engine where the firing order in the distributor cap must match the camshaft. Not only is the firing order different on the 302- and 351W engines, but Ford also numbers its cylinders differently than GM engines. On the Ford it is 1,2,3,4 on the passenger side starting at front of engine, and 5,6,7,8 on the drivers side.

I don't know who gave that "answer", but they must be Chevy people!! The 351Modified is NOT a WINDSOR engine!! It is derived from the 351CLEVELAND and it and its big brother the 400 share nothing with the little Windsor. The firing order for the 351/400M engines is 1-3-7-2-6-5-4-8. All the blah blah about 289 cams etc. is totally irrelevant to the question!!