65 327 header question - Impala Tech
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post #1 of 13 (permalink) Old 10-04-2015, 08:37 AM Thread Starter
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65 327 header question

I have a 327 in my 65 impala now and plan to do a few upgrades to it. It has high performance heads now and I'm going to stroke the lower end. I am adding an aluminum intake and valve covers. It has the stock exhaust manifolds now. My question is has anyone put headers on and been able to keep the stock locations of the alternator and air conditioning unit? The brackets today are used on the original manifolds.
Thanks!
Jim
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post #2 of 13 (permalink) Old 10-04-2015, 02:34 PM
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You have to buy a Mr. Gasket alternator mounting bracket that bolts to the header. It is a piece of bent flat stock with a couple of holes in it.

http://www.summitracing.com/parts/mr...FQ2PHwodi7kIUg

There isn't a bracket that works with a A/C compressor, but a piece can be fabricated by welding up sheet stock; or simply by spacing out the factory brackets.

Big Dave
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post #3 of 13 (permalink) Old 10-04-2015, 04:46 PM Thread Starter
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Thanks Dave I figured it could be done. Has an one out there figured out how to mount the AC unit yet?
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post #4 of 13 (permalink) Old 10-04-2015, 06:10 PM
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Quote:
Originally Posted by 65 Impaula View Post
I have a 327 in my 65 impala now and plan to do a few upgrades to it. It has high performance heads now and I'm going to stroke the lower end. I am adding an aluminum intake and valve covers. It has the stock exhaust manifolds now. My question is has anyone put headers on and been able to keep the stock locations of the alternator and air conditioning unit? The brackets today are used on the original manifolds.
Thanks!
Jim
Jim,

Because you are planning to keep your A/C, I'm assuming you're not planning a high revving screamer. If that is correct, you may be able to stay with the cast iron manifolds and not give up much.

https://www.youtube.com/watch?v=qe9ke0rQlT8

Take a look at the above paying particular attention to the comparisons (headers vs manifolds). Just a thought for consideration.

Pete
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post #5 of 13 (permalink) Old 10-05-2015, 08:52 AM Thread Starter
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Hey Pete thanks for the link. That answers my concern of power loss. I am building this for my wife and all wants is to look good and have a little snort off the line. I on the other hand try to push her into more HP.
I need to remember this is for her and she just want a fun driver car.
Thanks again we both enjoyed the clip.
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post #6 of 13 (permalink) Old 10-05-2015, 11:45 AM
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Quote:
Originally Posted by 65 Impaula View Post
Hey Pete thanks for the link. That answers my concern of power loss. I am building this for my wife and all wants is to look good and have a little snort off the line. I on the other hand try to push her into more HP.
I need to remember this is for her and she just want a fun driver car.
Thanks again we both enjoyed the clip.
You're welcome.

An engine of similar build (a sbc of 383 cu in.) to that one can easily bring a max 350+ hp, and 400+ lb ft torque w/o headers. The torque will 'come on' strong around 2000 rpm and max out around 3800 rpm (a very nice range for driving). If you have a power glide transmission you will especially appreciate the low end torque.

The car and engine from that video belongs to "dcairns" who often posts on this (and other) forum. He may be willing to share some of his experiences with you. Perhaps you could pm him.

It certainly isn't the only way to 'skin the cat', just one alternative. I have a '383' built from a 350 cu in sbc (same physical dimensions as a 327 just a longer stroke for 350 and longer still for 383). It was built for low end torque and pulls to my satisfaction.
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post #7 of 13 (permalink) Old 10-06-2015, 09:03 AM
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As japete92 said, build for torque, not hp for a street car.
Torque gets the car moving, hence the "snort' off the line...
If you have PS, that is another concern with tube headers. I haven't found a good solution for the back bracket that doesn't involve more fabrication...

'62 Impala SS 409 TH350
'66 Chevelle SS 496 M20
'70 Chevelle SS 396 M20
'67 Camaro ss/rs 350 PG
'38 Chev coupe street rod
'54 Chev 210 2 door
'69 Chev C10
'89 Chev R3500 roll back
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post #8 of 13 (permalink) Old 10-09-2015, 08:35 AM Thread Starter
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Thanks Mitch for the comments. Also thanks for catching the "snort" comment. Oh the challenges and joys of building a car for your wife. Now if only I can find a way to talk her out of a lime green paint job!
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post #9 of 13 (permalink) Old 10-09-2015, 12:32 PM
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Quote:
Originally Posted by 65 Impaula View Post
Thanks Mitch for the comments. Also thanks for catching the "snort" comment. Oh the challenges and joys of building a car for your wife. Now if only I can find a way to talk her out of a lime green paint job!
At least your wife is involved with your cars. I have 6 and my wife has no interest in them, or driving them. She has driven the '66 Chevelle SS to off site storage a few times, and it has a 4 speed...

'62 Impala SS 409 TH350
'66 Chevelle SS 496 M20
'70 Chevelle SS 396 M20
'67 Camaro ss/rs 350 PG
'38 Chev coupe street rod
'54 Chev 210 2 door
'69 Chev C10
'89 Chev R3500 roll back
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post #10 of 13 (permalink) Old 10-10-2015, 10:22 AM
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Show her this. It's better than Lime...
Synergy Green


'62 Impala SS 409 TH350
'66 Chevelle SS 496 M20
'70 Chevelle SS 396 M20
'67 Camaro ss/rs 350 PG
'38 Chev coupe street rod
'54 Chev 210 2 door
'69 Chev C10
'89 Chev R3500 roll back
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post #11 of 13 (permalink) Old 10-11-2015, 09:46 AM Thread Starter
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Yeah that's the color she wants. Not what I'd choose but i have to remember its her car!
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post #12 of 13 (permalink) Old 10-11-2015, 10:35 AM
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I hear 'ya, I'm not a big green fan either but if it has to be Green, that is a cool color. They are hard to find because not many got ordered and GM dropped the color after 1 year... If you get a chance to see it in person, it is a cool metallic paint...

'62 Impala SS 409 TH350
'66 Chevelle SS 496 M20
'70 Chevelle SS 396 M20
'67 Camaro ss/rs 350 PG
'38 Chev coupe street rod
'54 Chev 210 2 door
'69 Chev C10
'89 Chev R3500 roll back
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post #13 of 13 (permalink) Old 10-26-2015, 07:55 AM Thread Starter
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When we lived in Detroit we saw one rolling down the road. I think that's where she got the idea!
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