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  #1  
Old 05-23-2021, 10:32 PM
Jim Hoke Jim Hoke is offline
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Default Header help...... LS427 into a second gen TA

Halp!
Car is a '79 Trans Am and am gathering swap parts. Installing a GM crate LS7 wet sump and T56, and have Detroit Speed half height mounts on the car. Also have their subframe connectors, and have welded them to the front sub and rear frame rails (no way to go back to full height mounts).
I also have Holley engine and trans mounts - which offset the driveline.

My dilemma - Holley's Blackheart full length headers are made to match their mounts, but they caution not to use these with half height body mounts.

So, am I looking at beating the crap out of my floor, or is their another choice (other than mid-length headers)?

Thanks!
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Old 05-26-2021, 09:20 AM
colorado80439 colorado80439 is online now
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The options I know of are Detroit speed headers which may be worth a call to see what they say. The guy in the know is at Ultimate headers, Jim Browning, he will go out of his way to help, they have a great selection of headers for LS swaps,
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Old 06-01-2021, 11:16 PM
Jim Hoke Jim Hoke is offline
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Colorado80439, thanks for the suggestion. Iíve already talked to Jim at Ultimate, and heís sent me a couple of dimensions that Iíll be able to use for fitment (header flange bolt to the floor pan, or engine mount bolt boss on the block to floor pan. Great guy and willing to help!
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