LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

Will this combo fit? (5.3 swap in my '91)

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Old Jan 16, 2020 | 11:05 AM
  #1  
NCFarmLife's Avatar
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From: Central'ish NC
Car: 91 Z28, Black and Grey, T-Top
Engine: 5.3L LS-Swapped
Transmission: 4L60E
Axle/Gears: 3.42
Will this combo fit? (5.3 swap in my '91)

Started on my LS1 swap in my '91 Z28. I'm looking at using the TransDapt SBC mounts from Jegs, located here. AC delete is fine for now.

A couple questions:
- Will the Holley 302-2 pan fit?
- Do the stock truck headers fit? (if not, is there anything cheaper than the Holley Blackheart or Hawks "budget" options?)
- Accessories: Looking at the dirty dingo options to stick with the truck accessories, but not sure which kit I need.

Any other fitment issues? (I'll be using the 4L60E trans from my donor as well)
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Old Jan 16, 2020 | 11:27 AM
  #2  
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From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Re: Will this combo fit? (5.3 swap in my '91)

Originally Posted by NCFarmLife
Started on my LS1 swap in my '91 Z28. I'm looking at using the TransDapt SBC mounts from Jegs, located here. AC delete is fine for now.

A couple questions:
- Will the Holley 302-2 pan fit?
- Do the stock truck headers fit? (if not, is there anything cheaper than the Holley Blackheart or Hawks "budget" options?)
- Accessories: Looking at the dirty dingo options to stick with the truck accessories, but not sure which kit I need.

Any other fitment issues? (I'll be using the 4L60E trans from my donor as well)
Will the Holley 302-2 pan fit? - Depends on the K-member that you use but it offers a ton of clearance in regards to typical 3rd gen K-member structure (OEM or Tubular)

Do the stock truck headers fit? (if not, is there anything cheaper than the Holley Blackheart or Hawks "budget" options?) - Speed engineering makes a set of long tubes for $300. Do a quick search on this forum and you will see all the pros and cons of these, however, the consensus is that the trade offs are worth it given their cheap entrance fee.

Accessories: Looking at the dirty dingo options to stick with the truck accessories, but not sure which kit I need. - The only suggestion that I can give you on accessories is to read, read and read. There are a million ways to do this and all have their pluses and minuses. Your decision will likely come down to what spacing you want (there are 3 LSX spacing options), and if you have hood clearance concerns.
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Old Jan 16, 2020 | 12:00 PM
  #3  
NCFarmLife's Avatar
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From: Central'ish NC
Car: 91 Z28, Black and Grey, T-Top
Engine: 5.3L LS-Swapped
Transmission: 4L60E
Axle/Gears: 3.42
Re: Will this combo fit? (5.3 swap in my '91)

Thanks for the quick response Shifty...

To clarify... I was asking if the Holley 302-2 and stock truck headers would fit if I went *specifically* with the TransDapt LS1 mounts on the stock K-Member. (minus AC) I did some reading and haven't found anyone using this combo, so I was unsure if it would work.

On the accessories - I'd like to stick with the truck spacing (for cost reasons) if dingo has a kit that will allow it to clear the stock hood/radiator/fans on my '91.
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Old Jan 16, 2020 | 12:54 PM
  #4  
ShiftyCapone's Avatar
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From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Re: Will this combo fit? (5.3 swap in my '91)

No header should interfere with the oil pan regardless of which one you choose. Maybe I am not understanding your question though?
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Old Jan 16, 2020 | 01:06 PM
  #5  
NCFarmLife's Avatar
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Posts: 43
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From: Central'ish NC
Car: 91 Z28, Black and Grey, T-Top
Engine: 5.3L LS-Swapped
Transmission: 4L60E
Axle/Gears: 3.42
Re: Will this combo fit? (5.3 swap in my '91)

Probably it's me not phrasing my question clearly...

I'm asking if using the TransDapt mounts will cause fitment issues with the Holley 302-2 to the K-Member OR the stock 5.3 truck headers to anything... (K-Member, frame, 4L60E trans, etc...)
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Old Jan 16, 2020 | 01:09 PM
  #6  
ShiftyCapone's Avatar
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From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Re: Will this combo fit? (5.3 swap in my '91)

Originally Posted by NCFarmLife
Probably it's me not phrasing my question clearly...

I'm asking if using the TransDapt mounts will cause fitment issues with the Holley 302-2 to the K-Member OR the stock 5.3 truck headers to anything... (K-Member, frame, 4L60E trans, etc...)

i gotcha now. Unfortunately I don't know. However, the holley pans give a lot of clearance around the k-member and I can't see any mount moving the engine drastically enough to cause interference. The F-body pan is different and can cause interference issues when using mounts that place the engine too far forward.
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