1970 LT1 barn find
Le Mans Master
Joined: Aug 2010
Posts: 8,519
Likes: 505
From: Bussey, IA
[QUOTE=split63;16041129
The mags have a polarized response, people love them or hate them. The fronts look okay, but the backs stick out too far[/QUOTE]
I love that old school look. What are the tire sizes on it,especially the rears? May be too wide for you, perfect for me! TIA Andy
The mags have a polarized response, people love them or hate them. The fronts look okay, but the backs stick out too far[/QUOTE]
I love that old school look. What are the tire sizes on it,especially the rears? May be too wide for you, perfect for me! TIA Andy
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Pro
Joined: Mar 2003
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From: Texas
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
What is your goal for this car?
Only reason I am saying is that if you are not going to a concourse restoration......the stock manifolds are woefully inadequate for even the Lo-Po 300hp setup. Headers on LT-1's are worth an easy 30 horsepower at the tire and it will rev much easier.......it would be difficult for me to own an LT-1 Vette or Z/28 without a pair of headers on it......in fact you could get an early Z/28 with headers in the trunk new....the 302DZ and the LT-1 were basically the same save for stroke.....
Just throwing it out there.....
Jebby
Only reason I am saying is that if you are not going to a concourse restoration......the stock manifolds are woefully inadequate for even the Lo-Po 300hp setup. Headers on LT-1's are worth an easy 30 horsepower at the tire and it will rev much easier.......it would be difficult for me to own an LT-1 Vette or Z/28 without a pair of headers on it......in fact you could get an early Z/28 with headers in the trunk new....the 302DZ and the LT-1 were basically the same save for stroke.....
Just throwing it out there.....
Jebby
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Pro
Joined: Mar 2003
Posts: 629
Likes: 20
From: Texas
What is your goal for this car?
Only reason I am saying is that if you are not going to a concourse restoration......the stock manifolds are woefully inadequate for even the Lo-Po 300hp setup. Headers on LT-1's are worth an easy 30 horsepower at the tire and it will rev much easier.......it would be difficult for me to own an LT-1 Vette or Z/28 without a pair of headers on it......in fact you could get an early Z/28 with headers in the trunk new....the 302DZ and the LT-1 were basically the same save for stroke.....
Just throwing it out there.....Jebby
Only reason I am saying is that if you are not going to a concourse restoration......the stock manifolds are woefully inadequate for even the Lo-Po 300hp setup. Headers on LT-1's are worth an easy 30 horsepower at the tire and it will rev much easier.......it would be difficult for me to own an LT-1 Vette or Z/28 without a pair of headers on it......in fact you could get an early Z/28 with headers in the trunk new....the 302DZ and the LT-1 were basically the same save for stroke.....
Just throwing it out there.....Jebby
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
If it wasn't for the shitty Miracle Auto Painting, or the like, paint job, this LT-1 would be a survivor. In fact, you can still see all the factory panel seams, so they did little to no prep work before painting. Makes me think the original paint is lurking under this terrible paint. My interest is to get the very few elements that are missing that make it more originally whole. It does not mean I will be installing them. It has headers, and I plan to keep them. The next owner has the option to continue the headers or install the correct original manifolds. I'm in no hurry to get these parts, but I want to know what is correct, when it comes along. Its odd that GM put such poor flowing manifolds on the high-revving LT-1.
It is very odd that GM deleted the 2.5” Rams Horn in 1965…..and odd they kept 2” outlets on the LT-1 but then the Camaro was even worse….
Maybe they thought new owners would install headers off the bat….
Nice find BTW…..
Jebby
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There is plenty of empirical data out there that show the long headers are definitely effective compared to stock manifolds. Plenty of dyno runs on YouTube. That's why I will keep the headers
Last edited by split63; Oct 9, 2021 at 01:52 PM.
Melting Slicks
Joined: May 2002
Posts: 2,476
Likes: 756
From: Laporte, IN
Most of the time these changes like exhaust manifolds were to reduce cost too a single design. Like in 1972 the same manifold was used LT and RT eliminating the bracket holes in the manifold so a single casting.
Le Mans Master
Joined: Oct 2010
Posts: 6,937
Likes: 848
From: melbourne florida
2023 C3 of the Year Finalist - Modified
- It has the right hood, not a converted big block hood
- Transistor ignition
- It has the right heads, with valve guides
- I scoped the pistons and they are domed
- It has the right aluminum intake manifold
- The water pump pulley is correct for LT1
- Holley carb and associated
- 6500 RPM red line tach
- It appears to have the original radiator...don't know if its the larger LT-1 or not. How can I tell?
Unfortunately, the engine is not the original. It appears to be a warranty replacement
The mags have a polarized response, people love them or hate them. The fronts look okay, but the backs stick out too far
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