289 small block header question - Page 2 - Vintage Mustang Forums
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post #16 of 31 (permalink) Old 12-29-2016, 02:05 PM
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I'm gonna go out on a limb and say that's a 3/8 drive, 7/16s deepwell, already established it is Craftsman. Edit, want to change my guess to a 3/8 3/8 socket

Last edited by Jedi; 12-29-2016 at 02:22 PM.
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post #17 of 31 (permalink) Old 12-29-2016, 02:29 PM
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I'm gonna go out on a limb and say that's a 3/8 drive, 7/16s deepwell, already established it is Craftsman. Edit, want to change my guess to a 3/8 3/8 socket

Lol, actually it's a Craftsman metric socket, the straight knurling is the clue. I jammed it in the clamp to hold it open. I think it was a 10MM since it works on 3/8" nuts and bolts which I was using at the time. ARP specifically.

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post #18 of 31 (permalink) Old 12-29-2016, 02:43 PM Thread Starter
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Originally Posted by sr1032 View Post
Dougs Tri-Y's fit for sure, I've been very happy with them and they fit great with the z-bar, I'm converting to hydraulic regardless but I've had the same setup for the last three years with zero issues.
Are you also running the TCP rack?
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post #19 of 31 (permalink) Old 12-29-2016, 02:44 PM
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I'm going to have to inspect my knurling tonight.
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post #20 of 31 (permalink) Old 12-30-2016, 10:17 AM
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I can't address the steering gear issue, but can tell you that the JBA shorties in my '66 hit the Z-bar and stock steering gear. My installation required Ron Morris mounts and a 1/4" shim between the mount and engine block to raise the motor for clearance. It now clears the Z-bar. On the brighter side, shimming the motor up aligned the Z-bar and my clutch pedal feels like I just installed a hydraulic system. If I had it to do over, I'd go with a different header!
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'66 GT Fastback, 302, Edelbrock Top End, Sniper EFI/Aeromotive, MSD, JBA Headers & 2.5" Exhaust, T5Z, Currie 3.55 Trac-Loc
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post #21 of 31 (permalink) Old 08-03-2018, 08:23 AM Thread Starter
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Reviving this old thread since finally getting around to installing Z bar with the JBA headers.
Per info from JBA they said these headers would work
https://www.summitracing.com/parts/j...FRc6gQodmtwN7A

Running a late model T5.
No way the Z bar is going to work, can't even mount it.

I'm starting to wonder if anyone has had success with a Z bar running headers and TCP rack.
Car builder is putting a call into JBA today.

1967 Fastback 289 C4, silver frost on red
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post #22 of 31 (permalink) Old 08-03-2018, 11:08 AM
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While I don’t have your exact setup, nor do I have rack and pinion steering, I do have a 351w in my 65 fastback with a T5 in it. I used the JBA 1653’s along with a stock z bar and didn’t have any issues. What does the JBA z bar look like compared to the stock one? Is the clearance issue with the rack or with the z bar hitting the headers? Maybe the aftermarket JBA z bar itself is the issue?

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post #23 of 31 (permalink) Old 08-03-2018, 11:33 AM Thread Starter
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The headers clear the rack just fine. They are too close to the bellhousing to be able to attach any part of the Z.
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1967 Fastback 289 C4, silver frost on red
1967 GT Convertible, DMG on parchment
1967 GT S code 4spd coupe, Ski Country Special, Vail Blue
1968 GT S code C6 coupe, presidential blue on black (first car)

"I'm an all-set cobra jet creepin' through the night time"
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post #24 of 31 (permalink) Old 08-03-2018, 11:37 AM
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I don't know about JBA anymore. They have been manufactured overseas
for quite some time and I have no idea what they do for new part development.
They certainly aren't doing that in the Pertronix facility in San Dimas.
It's possible they have exhaust R&D courtesy of the Doug's acquisition but Doug's
was never known for their engineering prowess. (somewhat akin to Hooker,
maybe ever so slightly better)

That surprises me that FPA doesn't have fitment for the rack & pinion.
Edit- looks like they do now......

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Last edited by GT289; 08-03-2018 at 11:44 AM.
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post #25 of 31 (permalink) Old 08-03-2018, 12:08 PM
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The headers clear the rack just fine. They are too close to the bellhousing to be able to attach any part of the Z.
That’s really odd. I have a McLeod blowproof bellhousing or scattershield and they fit just fine around it and it sticks out more than the standard bellhousing does. Are you sure you got the right part number? Maybe call up JBA and ask if the 1653’s would better fit around your bellhousing?
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post #26 of 31 (permalink) Old 08-03-2018, 12:22 PM
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Originally Posted by 68gt390bench View Post
Reviving this old thread since finally getting around to installing Z bar with the JBA headers.
Per info from JBA they said these headers would work
https://www.summitracing.com/parts/j...FRc6gQodmtwN7A

Running a late model T5.
No way the Z bar is going to work, can't even mount it.

I'm starting to wonder if anyone has had success with a Z bar running headers and TCP rack.
Car builder is putting a call into JBA today.

I'm actually using JBA's long tube headers, z bar, and a TCP power rack and pinion. Plenty of clearance.

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post #27 of 31 (permalink) Old 08-03-2018, 01:18 PM Thread Starter
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I'm actually using JBA's long tube headers, z bar, and a TCP power rack and pinion. Plenty of clearance.
That's encouraging. Do you know what JBA part #?
You have a small block? What trans?

Thanks
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post #28 of 31 (permalink) Old 08-03-2018, 05:41 PM
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Time for some ebay tri-ys and maybe a hammer.
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post #29 of 31 (permalink) Old 08-03-2018, 11:03 PM
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Originally Posted by 68gt390bench View Post
That's encouraging. Do you know what JBA part #?
You have a small block? What trans?

Thanks
302 with a toploader 4 speed. Here's the review I did:

JBA 36610S Long Tube Header For 65-70 Mustang 302 Review ? Save Classic Cars

These are the polished versions, they also produce the exact same header with a natural finish at a much lower price.

1969 Convertible field find (450hp spaghetti noodle)
1968 Fastback (428 and a 4 speed)
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post #30 of 31 (permalink) Old 08-05-2018, 07:40 PM Thread Starter
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302 with a toploader 4 speed. Here's the review I did:

JBA 36610S Long Tube Header For 65-70 Mustang 302 Review ? Save Classic Cars

These are the polished versions, they also produce the exact same header with a natural finish at a much lower price.
Thank you.

Sure hope can exchange the current ones since JBA did recommend them and say they would work. It's been awhile tho and got them from Summit.

1967 Fastback 289 C4, silver frost on red
1967 GT Convertible, DMG on parchment
1967 GT S code 4spd coupe, Ski Country Special, Vail Blue
1968 GT S code C6 coupe, presidential blue on black (first car)

"I'm an all-set cobra jet creepin' through the night time"
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