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My olds: 1964 Jetstar 88 Holiday coupe
Original equipment: 330 V8 and 2 speed transmission.
Current equipment: 5.7 v8 from a 69 Cutlass and three speed transmission.
Problem: Can't get the stock exhaust manifold on (driver side)or Thornton 350 Jr manifolds to clear steering box. The steering box does not appear to be the original install to the vehicle. There is an extra hole on the mounting base of the steering box, that is not in service. I have been reading that 1964 Jetstar 88 did not come with power steering.
The Question: is anybody out there running power steering on a 64 Jetstar 88? If so, may I have some close up pictures so I can see the correct application? At this point it looks like I'm going to need to purchase a different steering box and lose my power steering. Unless there is a larger motor mount shim that can be purchased to lift the motor up a couple inches. If so, is there a drawback to that?
Any feedback would be appreciated fellas. I've been getting pretty frustrated trying to get a solid exhaust system on this car. When I bought the car it had a custom built header application that wrapped over the top of the steering box. This header was absolutely garbage. It had leaks just about everywhere that were beyond repairable.
First of all, I am simply going by my parts catalogs so I could be wrong.
1. Everything I can find says that a 1964 Jetstar88 could be had with power steering. Whether your steering box is correct I cannot tell you.
2. The drivers side exhaust manifold part number should be 393227. That number is not the same as the one for a 69 Cutlass.
I am thinking that if you can find a correct 330 exhaust manifold it might fit. I cannot tell from your picture exactly where it is hitting the steering box.
I have one customer that has a barn half full of Olds stuff. Ill see if I can get in touch with him and see what he has.
Can you tell what is the item I circled? That is a motor mount. That's not the best directional picture, but that doesn't appear to be what is stopping it from going in.
First of all, I am simply going by my parts catalogs so I could be wrong.
1. Everything I can find says that a 1964 Jetstar88 could be had with power steering. Whether your steering box is correct I cannot tell you.
2. The drivers side exhaust manifold part number should be 393227. That number is not the same as the one for a 69 Cutlass.
I am thinking that if you can find a correct 330 exhaust manifold it might fit. I cannot tell from your picture exactly where it is hitting the steering box.
I have one customer that has a barn half full of Olds stuff. Ill see if I can get in touch with him and see what he has.
After doing some research this looks like the center dump manifold with that part number. The pictures I see online, this might be my only option for the 64 Jetstar 88. Unless I have custom headers built, which I do not want to have done. Hopefully your client has one of these bad boys in good shape!
"Every single vendor lists Olds motor mounts incorrectly. As noted, ALL 1964-68 cars used 2261, no matter which Olds engine was installed in the car. The motor mounts must match the FRAME PADS, not the block. Every 1964-90 Olds block has the motor mount bolts in exactly the same location."
Do you know if you are using the motor mounts from your 1964 car or the 1969 engine?
"Every single vendor lists Olds motor mounts incorrectly. As noted, ALL 1964-68 cars used 2261, no matter which Olds engine was installed in the car. The motor mounts must match the FRAME PADS, not the block. Every 1964-90 Olds block has the motor mount bolts in exactly the same location."
Do you know if you are using the motor mounts from your 1964 car or the 1969 engine?
Shoot, I do not. I guess I will have to do a little more research. As for the exhaust manifold, I think the center dump manifolds it's what I'm looking for.
Matthew,
This guy has two heads with manifolds and the one looks like the correct one for what you are doing. Maybe shoot him a message on E-bay and see if he will just sell you the one manifold ?
Matthew,
This guy has two heads with manifolds and the one looks like the correct one for what you are doing. Maybe shoot him a message on E-bay and see if he will just sell you the one manifold ?
Your wisdom is greatly appreciated! Between then and now, I have located that driver side manifold and purchased it from a seller on eBay. Thank you again sir, I will pass some sort of knowledge that I have attained forward.
"Every single vendor lists Olds motor mounts incorrectly. As noted, ALL 1964-68 cars used 2261, no matter which Olds engine was installed in the car. The motor mounts must match the FRAME PADS, not the block. Every 1964-90 Olds block has the motor mount bolts in exactly the same location."
Do you know if you are using the motor mounts from your 1964 car or the 1969 engine?
I’m pretty sure these cars had model specific motor mounts( most 64 full size were still using 394’s still) I’m under the impression no a body or 65+ full size mount will work, which is to say he must have the correct motor mounts if the engine is in fact secured properly. When Joe sees this he’ll set us straight
There’s some centre dump after market manifolds that work on chassis that need centre dumps
The Sanderson headers can be hit and miss quality. My first 3 sets were fine, two coated and one raw steel. Including a center dump set like these, ceramic coated. The 4th set looked like I welded it, not so good. I bought the last set uncoated, they claimed because they weren't coated, the welds were unfinished.
The 1964 Jetstar 88 is a one-year-only chassis and engine combo. The ONLY manifolds that fit are the OEM ones for that car. The 330 manifolds will bolt to a 350. Manifolds for an A-body do NOT work due to the steerng box and linkage location. Note that 1964 Jetstar 88 was NEVER offered with dual exhaust. Unlike the 1965-70 full size big block cars, there is no factory dual exhaust manifold that will clear the steering box on a 64 J88.
The 1964 Jetstar 88 is a one-year-only chassis and engine combo. The ONLY manifolds that fit are the OEM ones for that car. The 330 manifolds will bolt to a 350. Manifolds for an A-body do NOT work due to the steerng box and linkage location. Note that 1964 Jetstar 88 was NEVER offered with dual exhaust. Unlike the 1965-70 full size big block cars, there is no factory dual exhaust manifold that will clear the steering box on a 64 J88.
[img alt="Joe,
So I know both of these will bolt up to 350, the casting numbers are different, but what is the difference? Is the manifold for the big block much larger or something?"]https://cimg1.ibsrv.net/gimg/classicoldsmobile.com-vbulletin/900x2000/screenshot_20250122_082008_5ec78c838da97869430427e 51751c5cee9a3e6d0.png[/img] Joe, So I know both of these will bolt up to 350, the casting numbers are different, but what is the difference? Is the manifold for the big block much larger or something?
380145 is the small block manifold used on 1964-70 full size cars with single exhaust (which is all of them).
384785 is the big block manifold used on 1965-70 full size cars with single exhaust.
The difference is in the length of the section that bolts to the exhaust pipe.
380145 is the small block manifold used on 1964-70 full size cars with single exhaust (which is all of them).
384785 is the big block manifold used on 1965-70 full size cars with single exhaust.
The difference is in the length of the section that bolts to the exhaust pipe.
Thank you for the clarification, I appreciate your knowledge. This forum has helped me exponentially.
