What is the firing order for a 1973 ford gran torino 351cid engine?

All 351 (C, M, or W) Ford engines (along with 400's and HO 302's) use the firing order: 1-3-7-2-6-5-4-8

Other Ford V8's (like non HO 260/289/302, 429/460, MEL and FE engines) use 1-5-4-2-6-3-7-8

Older V8's (Y-blocks and flatheads) use 1-5-4-8-6-3-7-2