1964 F-85, 455 swap?

billyrb

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I recently purchased a '64 F-85 which has a 330 V8. I have access to an Olds 455 and wondered if anyone here has done this swap? Wondering if there are any companies that make bolt-in conversion mounts, etc. Been about 15 years since I messed with Oldsmobiles, and I'm a bit out of the loop. Thanks!
 

joe_padavano

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There's no swap kit because none is needed. This is virutally a complete bolt-in. Olds big blocks and small blocks are externally identical except for the deck height - the big block decks are about an inch taller, resulting in a wider intake and different exhaust manifolds.

Simply use your existing 330 motor mounts, which will bolt to the 455 block. The 455 block will have three motor mount bolt holes in line on each side of the block. Use the back two. DO NOT get 455 motor mounts; these require different frame mounts that are unique to the 69-72 cars. You don't need them. In fact, the 65-68 A-body cars used the same motor mounts for both the big blocks and small blocks. The bellhousing bolt pattern is the same, so your existing trans will bolt right up. The 68-up motors use a different crank flange bolt pattern, so you'll need the flywheel (or flexplate) that goes with the 455. Your 330 flywheel won't work. You can either use A-body exhaust manifolds or headers for a 65-67 442.

The one big problem will be the water pump and radiator. 64 Cutlii used a unique water pump with a different outlet location from the 65-up motors. The lower radiator outlet is in a different location to match. The 330 pump will bolt to the 455 but probably won't cool it. A better choice is to use the 455 pump (which is pretty much the same for all 65-up motors) and get a 4 row radiator made with the outlet in the right location (on the pass side). Note that the water pumps for A/C (and HD cooling) are longer than non-A/C pumps, with correspondingly different water pump pulleys.

Accessory brackets may be another sticking point. The 65-up brackets all have two sets of holes to allow use on either big or small blocks, but your 64 may not have this feature (since the big block didn't come out until 65). The easiest thing to do is get the brackets off a 65-67 big block (RWD only, not Toronado) which will bolt to your 455 and let you keep your existing accessories. If you want to change to a later PS pump, you can probably use the 455 PS brackets (though I'm not 100% sure if the 68-up pump location will clear the steering box on the 64-67 cars).
 
G

G-683866

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There's no swap kit because none is needed. This is virutally a complete bolt-in. Olds big blocks and small blocks are externally identical except for the deck height - the big block decks are about an inch taller, resulting in a wider intake and different exhaust manifolds.

Simply use your existing 330 motor mounts, which will bolt to the 455 block. The 455 block will have three motor mount bolt holes in line on each side of the block. Use the back two. DO NOT get 455 motor mounts; these require different frame mounts that are unique to the 69-72 cars. You don't need them. In fact, the 65-68 A-body cars used the same motor mounts for both the big blocks and small blocks. The bellhousing bolt pattern is the same, so your existing trans will bolt right up. The 68-up motors use a different crank flange bolt pattern, so you'll need the flywheel (or flexplate) that goes with the 455. Your 330 flywheel won't work. You can either use A-body exhaust manifolds or headers for a 65-67 442.

The one big problem will be the water pump and radiator. 64 Cutlii used a unique water pump with a different outlet location from the 65-up motors. The lower radiator outlet is in a different location to match. The 330 pump will bolt to the 455 but probably won't cool it. A better choice is to use the 455 pump (which is pretty much the same for all 65-up motors) and get a 4 row radiator made with the outlet in the right location (on the pass side). Note that the water pumps for A/C (and HD cooling) are longer than non-A/C pumps, with correspondingly different water pump pulleys.

Accessory brackets may be another sticking point. The 65-up brackets all have two sets of holes to allow use on either big or small blocks, but your 64 may not have this feature (since the big block didn't come out until 65). The easiest thing to do is get the brackets off a 65-67 big block (RWD only, not Toronado) which will bolt to your 455 and let you keep your existing accessories. If you want to change to a later PS pump, you can probably use the 455 PS brackets (though I'm not 100% sure if the 68-up pump location will clear the steering box on the 64-67 cars).
What about the oil pan and front suspension?
 
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