Aluminum Intake Manifolds
Thread Starter
Instructor
Joined: Jun 2010
Posts: 120
Likes: 1
From: CT
Aluminum Intake Manifolds
I am considering engine options for my 1971 4-SPD Base Motor. All of the options I'm considering include installing an aluminum intake manifold if I can fit it, but I want to get the spread bore version and use the original Q-Jet Carb. I went through this with my 75 and the Edelbrock Performer fit just fine but of course the hood on the 75 has plenty of room. I don't think there will be adequate under hood clearance with the 71 Base Motor (flat hood).
I've seen a good handful of posts on this, but does anyone have the final analysis?
Can I use the spread bore high rise version (2101) and still clear the hood with the original Q-Jet 7041213??
Just add a drop air cleaner??
Howard
I've seen a good handful of posts on this, but does anyone have the final analysis?
Can I use the spread bore high rise version (2101) and still clear the hood with the original Q-Jet 7041213??
Just add a drop air cleaner??
Howard
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
I would have to say no after measuring mine during the build......
I had a vintage Weiand 8004 and it just cleared....with a slight rub using a Moroso Drop base unit.......
The intake you are inquiring about is like the factory LT-1 unit and they need a small bump in the hood to clear......
My Team G required me to go to a L-88 hood......
Jebby
I had a vintage Weiand 8004 and it just cleared....with a slight rub using a Moroso Drop base unit.......
The intake you are inquiring about is like the factory LT-1 unit and they need a small bump in the hood to clear......
My Team G required me to go to a L-88 hood......
Jebby
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Sorry, don't know what the base motor is for '71. It was called an L48 by 1974. The entry level intakes by Weiand, Holley, Edelbrock should all fit as they are designed for stock replacement. Now if you want Chevy/GM you have to look at late 70's for aluminum intakes as there were no aluminum intakes on the 350 sbc for over 5 years in the early 70's. But none of them used a "divorced choke" carb. All hot air or electric chokes and since you don't have that I formation posted you need to look into that for yourself.
I used to pick up the stock aluminum sbc intakes at swap meets for 10 bucks. Never paid more than that for one of those. Also have a low profile Duntov (made by Holley) single plane intakes with the snowflake casting symbol. It even has an EGR casting mount.
. You can find those on eBay if that's what flips your switch.
Keep looking and have fun with it. Hey it's a hobby.
I used to pick up the stock aluminum sbc intakes at swap meets for 10 bucks. Never paid more than that for one of those. Also have a low profile Duntov (made by Holley) single plane intakes with the snowflake casting symbol. It even has an EGR casting mount.
. You can find those on eBay if that's what flips your switch.Keep looking and have fun with it. Hey it's a hobby.
Race Director
Joined: Aug 1999
Posts: 18,126
Likes: 174
From: WI
I am considering engine options for my 1971 4-SPD Base Motor. All of the options I'm considering include installing an aluminum intake manifold if I can fit it, but I want to get the spread bore version and use the original Q-Jet Carb. I went through this with my 75 and the Edelbrock Performer fit just fine but of course the hood on the 75 has plenty of room. I don't think there will be adequate under hood clearance with the 71 Base Motor (flat hood).
I've seen a good handful of posts on this, but does anyone have the final analysis?
Can I use the spread bore high rise version (2101) and still clear the hood with the original Q-Jet 7041213??
Just add a drop air cleaner??
Howard
I've seen a good handful of posts on this, but does anyone have the final analysis?
Can I use the spread bore high rise version (2101) and still clear the hood with the original Q-Jet 7041213??
Just add a drop air cleaner??
Howard
I have a Edelbrock performer available ($75+shipping), if you or anyone else is interested send a PM and I will post some pics
Thread Starter
Instructor
Joined: Jun 2010
Posts: 120
Likes: 1
From: CT
Thanks to all for the advice and commentary.
I'm almost settled on a crate stroker from BP Engines.
http://www.blueprintengines.com/inde...ecs-bp38313ct1
At least that's the next year plan as of right now (if I ever get the interior finished). I'm fairly certain that a 2101 can be accommodated with the right drop base on the air cleaner.
If not, the backup plan will be to re-install the factory iron manifold after a port and polish. It will rob a HP or two, but will work just fine if necessary for clearance.
I built a pretty stout motor on my old 75 but just the top end (RPM Performer Intake, 600 CFM Edelbrock Carb, Trick Flow Twisted Wedge Aluminum heads, Comp Roller Rockers, Lunati 268 Cam), so I'd like to try a stroker for the torque this time around. Seems like a crate engine is a pretty economical option after I started costing out all of the build activities and components I wanted.
I'm almost settled on a crate stroker from BP Engines.
http://www.blueprintengines.com/inde...ecs-bp38313ct1
At least that's the next year plan as of right now (if I ever get the interior finished). I'm fairly certain that a 2101 can be accommodated with the right drop base on the air cleaner.
If not, the backup plan will be to re-install the factory iron manifold after a port and polish. It will rob a HP or two, but will work just fine if necessary for clearance.
I built a pretty stout motor on my old 75 but just the top end (RPM Performer Intake, 600 CFM Edelbrock Carb, Trick Flow Twisted Wedge Aluminum heads, Comp Roller Rockers, Lunati 268 Cam), so I'd like to try a stroker for the torque this time around. Seems like a crate engine is a pretty economical option after I started costing out all of the build activities and components I wanted.
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