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64½ vs. 65 Mustang Engine Compartment, Exhaust & Transmission Differences

By Jason Zimberoff

Compiled from lists on the web by Klaus Schaefer, Mark Dorner, Christopher Duffy
and the book Mustang & Ford Small Block V8 by Bob Mannel
(Go Buy It!)

Special thanks also go out to Charles Turner, and Steve Grant.
Click Here for more 64½ related questions, answers, and info...

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Engine Compartment, Exhaust & Transmission

1. 64.5 had unique engines: 5 Bolt V8's - 260 2V (F Code), 289 4V Low Compression (D Code) and 289 4V High Performance (K Code with Aluminum Water Pump), 6 cylinder - 170 (U Code).

In 65, the engines changed to: 6 Bolt V8's - 289 2V (C Code), 289 4V (A Code), and 289 High Performance (K Code with Cast Iron Water Pump), 6 Cylinder - 200 (T Code).


64.5 260 V8 2V

65 289 V8 2V
2. Different service specification decals

64.5 Service Decal

65 Service Decal
3. Transmissions have close bell housing pattern - 5 bolts, no ears; smaller input bearing cover

64.5 Bell Housing

65 Bell Housing
4. Timing cover on V8 includes oil filler tube on road draft engines, and dipstick tube on all engines (road draft option reintroduced after 5/25/64)

64.5 Timing Cover

65 Timing Cover
5. Water pump is Aluminum and fit's only on early timing chain cover. Early versions had no hole drilled for alternator bracket. Intermediate version used early style pum but had tapped hole for alternator. The later cast iron water pumps did not appear until around June, 1965.

64.5 Early Water Pump

64.5 Water Pump With Tapped Hole

65 Water Pump
6. Valve cover on V8 has No oil filler cap if filler is on timing cover.

64.5 Road Draft Left Valve Cover

Later 64 and 65 Left Valve Cover
7. Small opening for PCV valve on passenger side valve cover - missing if road draft used

64.5 Road Draft Right Valve Cover (Missing PCV hole)

Later 64 and 65 Right Valve Cover
8. PCV valve is different. (64 has threaded top for brass elbow)

64.5 PCV Valve

65 PCV Valve
9. PCV hose connects straight to brass elbow without turndown to valve

64.5 PCV Hose

65 PCV Hose
10. PCV used brass elbow instead of turned down hose

64.5 PCV Elbow

65 PCV Hose
(No Elbow)
11. Engine has a road draft tube if PCV valve is not used (which means there are some engines that have valve covers on both sides with no holes)

64.5 Road Draft Tube

Later 64 and 65 PCV Only
12. Oil Pan has different location of oil drain hole with slightly different stamped ridges

64.5 Oil Pan

65 Oil Pan
13. Dual exhaust with transverse muffler (before 8/15/64)

64.5 Early Dual Exhaust

65 Dual Exhaust
14. Dual exhaust system mufflers were parallel but no resonators; pipes are turned down

64.5 Dual Exhaust

65 Dual Exhaust
15. Rear tail pipe hangers for dual exhaust are not through the frame

64.5 Tail Pipe Hangers

65 Tail Pipe Hangers
16. 64.5 Has Unique Exhaust Pipe Clamps

64.5 Exhaust Pipe Clamps

65 Exhaust Pipe Clamps
17. Brake hose brackets - Front have a hexagonal cut-out instead of star washer cut-out

64.5 Brake Hose Brackets

65 Brake Hose Brackets
18. Kick down rod linkage is different for all automatic transmissions

64.5 Kick Down

65 Kick Down
19. Differential has special U-Joint with all 170 CID

64.5 U Joint for 170 CID

65 U Joint for 200 CID
20. Molded radiator hose with all 260/289 CID

64.5 V8 Radiator Hose

65 V8 Radiator Hose
21. Transmission has unique mount insulators with all 260/170 CID

64.5 Trans Mount

65 Trans Mount
22. Air cleaner filter unique with all 260 CID

64.5 260 Air Filter

65 289 Air Filter
23. Spark plugs - BF42 plugs on 260 and 289, BF32 on hi-po

64.5 Spark Plugs

65 Spark Plugs
24. Crank pulley is cast iron and is triple sheave slotted on all 260 CID

64.5 260 Crank Pulley

65 289 Crank Pulley
25. Water pump pulley is two sheave slotted cast iron with all generator engines

64.5 Water Pump Pulley

65 Water Pump Pulley
26. Front of drive shaft (HIPO/4spd) before 10/05/64 has 28 splines (there was a 25 Spline Toploader though - so may not always be correct)

64.5 Drive Shaft

65 Drive Shaft
27. Air conditioner compressor has different bracket

64.5 AC Bracket

65 AC Bracket
28. Air conditioner idler has special pulley and bracket assembly

64.5 AC Idler

65 AC Idler
29. No convertible reinforcement cowl braces from fender apron to firewall (braces added on 11/11/64 - braces may be found on cars with build date as early as October (K), 1964, as they were running behind around then.)

64.5 Cowl Brackes

65 Cowl Braces
30. Yellow top coil has unique mounting point beside carburetor on manifold

64.5 Coil Mount

65 Coil Mount
31. Fuel line to carburetor passes front of distributor on all 64.5 V8's.

64.5 Fuel Line

65 Fuel Line
32. Distributor has a small oil filler cap

64.5 Distributor

65 Distributor
33. Distributor Rotor, condensor, vac. line unique with all 170 CID

64.5 170 Distributor

65 200 Distributor
34. Brake master cylinder - two types - different on power brake

64.5 Master Cylinders

65 Master Cylinder
35. Brake master cylinder cap is copper, painted black and stamped with "fill with heavy duty fluid only"

64.5 Master Cylinder Cap

65 Master Cylinder Cap
36. Brake light switch mounts on special master cylinder

64.5 Brake Light Switch

65 Master Cylinder (no switch)
37. No air cleaner decal for engine displacement until late July 1964.

64.5 Early Air Cleaner Decals

65 Air Cleaner
38. Air Cleaner and Valve Covers painted light blue on 260.

64.5 260 Engine

65 289 Engine
39. Horns are much larger and are mounted on the frame.

64.5 Horn

65 Horn
40. Negative battery cable has a holddown clamp. (This was probably dropped before the swith over to alternators.)

64.5 Battery Cable Clamp

65 Battery Cable
41. Power steering used Eaton pump with special adaptor. (Con tinued into early 65 cars as well.) With air conditioning, the Eaton pump used a remote reservoir attached to the driver side inner fender apron.

64.5 Power Steering Pump

65 Power Steering Pump

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