I need a diagram of the distributor firing order for a 1988 Ford 460 motor for a Shasta Motorhome

7-2-6-5-4-8
i hope this helps as this should be the correct firing order for your car

https://www.460ford.com/threads/i-need-the-460-firing-order.101421/ this link has your requested info

Firing order 1-3-7-2-6-5-4-8 --------- front ' 1 2 3 4 ' of ' 'distributor rotates counter vehicle ' 5 6 7 8 'clockwise

300 straight six 153624 distributor rotation clockwise, 232 v6 142536 distributor rotation counterclockwise.

255/302/360/390/460 15426378 distributor rotation counterclockwise,

351 & 400 W & M 13726548 distributor rotation counterclockwise.

Fig. 6: 8-cylinder engine - 302, 429, 460 Firing Order: 1-5-4-2-6-3-7-8 Distributor Rotation: Counterclockwise

Hello! Here are two vacuum diagrams for the 460 engine...#1=1987-89....And #2=1990-95...Depending on manufacture date of your motor home's engine I'm sending both diagrams...Guru.............Saailer

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

FIRING ORDERS NOTE: To avoid confusion, remove and tag the spark plug wires one at a time, for replacement. If a distributor is not keyed for installation with only one orientation, it could have been removed previously and rewired. The resultant wiring would hold the correct firing order, but could change the relative placement of the plug towers in relation to the engine. For this reason it is imperative that you label all wires before disconnecting any of them. Also, before removal, compare the current wiring with the accompanying illustrations. If the current wiring does not match, make notes in your book to reflect how your engine is wired. Fig. 1: 300 cid (4.9L) inline six-cylinder engines Firing order: 1-5-3-6-2-4 Distributor rotation: Clockwise
Fig. 2: 232 cid (3.8L) V6 engine Firing order: 1-4-2-5-3-6 Distributor rotation: Counterclockwise
Fig. 3: 255 cid (4.2L), 302 cid (5.0L), 360 cid (5.9L), 390 cid (6.5L), 460 cid (7.5L) V8 engines Firing order: 1-5-4-2-6-3-7-8 Distributor rotation: Counterclockwise
Fig. 4: 351 cid W & M (5.8L), 400 (6.6L) engines Firing order: 1-3-7-2-6-5-4-8 Distributor rotation: Counterclockwise
Fig. 5: 6.9L diesel engines Firing order: 1-2-7-3-4-5-6-8

302 or 460 1-5-4-2-6-3-7-8, if 351 or 400, 1-3-7-2-6-5-4-8 and it rotates Counter-clockwise (left hand)