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#1 |
Registered User
Join Date: Apr 2022
Location: Moorpark, CA
Posts: 758
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MC/Booster conversion
does the 11" booster fit on a 72 6 cyl truck?
Looking at this disc/drum one by CPP https://www.summitracing.com/parts/c...ckup/year/1972 or do I need to get the 9"? |
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#2 |
Who Changed This?
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Location: Simi Valley, CA
Posts: 10,432
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Re: MC/Booster conversion
I have a big block in my '70 truck with an 11" booster. You'll be fine.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#3 |
Registered User
Join Date: Apr 2022
Location: Moorpark, CA
Posts: 758
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Re: MC/Booster conversion
Thanks, I was more concerned with hood clearance with the CPP unit. Yeah 6 cyl there is plenty of room otherwise
The Summit link says disc/disc for that # which is a misprint according to the Summit tech. Its for a disc/drum system. I am converting from manual to power hey your in Simi...you ever go to R&R Cafe Coachman Cruise 1st Saturdays? |
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#4 |
Senior Member
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Location: TX
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Re: MC/Booster conversion
I'm going to say it might not clear. That's why they put the offset air cleaner on power brake trucks. My pictures are of 1968 and the 1972 air cleaner sits a little lower.
Previous owner took a chunk out of the corner of my air cleaner to clear the 3/4 ton booster. ![]() Picture from before I cleaned everything up. ![]() |
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#5 |
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Join Date: Aug 2009
Location: Bowser
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Re: MC/Booster conversion
I’ve read somewhere that the six cylinder air cleaner doesn’t fit with the big booster.
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#6 | ||
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Re: MC/Booster conversion
Quote:
Quote:
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#7 |
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Join Date: Apr 2022
Location: Moorpark, CA
Posts: 758
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Re: MC/Booster conversion
well the plot thickens....the 411 on "check fit" on Summit says its for the 4.1 (6 cyl)...and CPP site makes no mention one way or the other
Fortunately Summit is good on returns should it not fit. With that said I am not married to the stock air cleaner With that said...would have to look for the circle type filter one for a 1 brl carb like the ones seen so much on....well like my 67 Camaro 4 brl car the 9" version is for disc/disc from CPP |
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#8 | |
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Join Date: Oct 2015
Location: Williamston, Mi
Posts: 882
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Re: MC/Booster conversion
Quote:
Last edited by old51sedan; 05-04-2022 at 02:56 PM. Reason: more information |
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#9 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,625
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Re: MC/Booster conversion
Make your own air cleaner.
I made several for my dual quad. Just use 1/8 inch thick aluminum sheet. Like in this pic. |
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#10 |
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Join Date: Apr 2022
Location: Moorpark, CA
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Re: MC/Booster conversion
if needed, this would be a plug & play swap. I would just put a breather cap on the VC instead of the hose going to air cleaner
https://www.amazon.com/Inch-Chrome-C...4&sr=8-12&th=1 or this and keep the breather hose routed to air cleaner https://www.amazon.com/Inch-Chrome-C...75NQ1F81&psc=1 Last edited by 72SB; 05-03-2022 at 05:52 PM. |
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#11 |
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Re: MC/Booster conversion
You really should keep the breather inside the air cleaner. You will smell less oil fumes, if the truck makes any. Plus that breather cap will need cleaning to get the accumulated dirt out. If you make one like Geezer says, you can eliminate any booster clearance issues by off setting the stud hole. That would also give room for the breather hose from the valve cover.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#12 |
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Join Date: Apr 2022
Location: Moorpark, CA
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Re: MC/Booster conversion
breather nipple is inside the air cleaner (10") I showed
This assumes the CPP unit has a clearance issue. Anyone install the CPP 11"? |
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#13 |
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Location: Herculaneum MO (20 minutes south of St. Louis
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Re: MC/Booster conversion
The 10 inch air cleaner will not clear that large booster. I put a K&N air cleaner assembly that is about 7 inches and that barely clears.
I'd like to go to a offset oil bath air cleaner if I could find one.
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67 C10 283 T5 swapped longbed fleetside = wife's daily driver 67 C20 292 (originally a 250)4speed longbed fleetside w/original wooden bed=my project truck 67 C10 283+.060 (so a 292 as well)T5 swapped longbed fleetside=my DD 72 C1500 Sierra Grande 350 TH350 longbed fleetside=wife's fair weather truck Can you tell we are fans of longbed fleetsides & 67s Chris Last edited by 67 twins; 05-04-2022 at 03:00 AM. |
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#14 |
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Join Date: Apr 2022
Location: Moorpark, CA
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Re: MC/Booster conversion
In looking at post Jason's pic, he has about 1-1/2" cut off the stock 13" and his booster is about twice as thick as the CPP (maybe its a double bladder??)
I will find out once installed. The smaller element I linked otherwise will work. Breather cap on VC will be fine. Just like SBC PCV plumbing with breather on VC |
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#15 |
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Location: TX
Posts: 1,571
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Re: MC/Booster conversion
Yes those pictures are a double bladder like on 3/4 ton trucks. I do believe there is a chance that CPP setup might work.
I replaced that booster with a setup exactly like this: https://www.ebay.com/itm/20184081924...EAAOSwfVpYuaoS 8 Inch dual diaphragm. |
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#16 |
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Location: TX
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Re: MC/Booster conversion
Wish I could get a better picture, but I can't get the hood all the way up right now without it hitting something...anyway here's another view.
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#17 |
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Join Date: Apr 2022
Location: Moorpark, CA
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Re: MC/Booster conversion
Thanks for pics Jason. Given the 11" single bladder is thinner than your double, I suspect one of the smaller air cleaner set ups I linked will work. Ideally the 10"
Won't know till I get it in or at least audition in mockup I am not concerned about having a "stock" look for air cleaner. Having power vs manual brakes is the priority. This truck may have a 383 and 5 speed TKX sooner than later.....although the "charm" of the 6 w/3OTT is still nice....and I have 2 other "muscle" cars to satisfy the need for speed the C10's roommate |
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#18 |
Senior Member
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Location: Herculaneum MO (20 minutes south of St. Louis
Posts: 619
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Re: MC/Booster conversion
As I said above the 10 inch air cleaner will NOT fit with the large booster.
This is a pic of mine. That is the CPP booster and a 7 inch K&N. As you can see my index finger barely fits in between. You are not going to fit a 1o inch in there.
__________________
67 C10 283 T5 swapped longbed fleetside = wife's daily driver 67 C20 292 (originally a 250)4speed longbed fleetside w/original wooden bed=my project truck 67 C10 283+.060 (so a 292 as well)T5 swapped longbed fleetside=my DD 72 C1500 Sierra Grande 350 TH350 longbed fleetside=wife's fair weather truck Can you tell we are fans of longbed fleetsides & 67s Chris |
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#19 | |
Registered User
Join Date: Apr 2022
Location: Moorpark, CA
Posts: 758
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Re: MC/Booster conversion
Quote:
where did you plum into vacuum for booster? carb base or the nipple on intake manifold? https://www.speedwaymotors.com/6-3-8-Inch-Chrome-Air-Cleaner-2-Barrel-Carb-2-5-8-Inch-Neck,713.html?sku=5504350&utm_matchtype={match_type}&msclkid=2634f9ebe6971169a6ab9b9920d8d66d&utm_so urce=bing&utm_medium=cpc&utm_campaign=SMI%20-%20Shopping%20(CSE)%20(Bing)&utm_term=4577404348890847&utm_content=All%20Products%20(Feb28_2020) |
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#20 |
Senior Member
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Location: Herculaneum MO (20 minutes south of St. Louis
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Re: MC/Booster conversion
Yes the smaller air cleaner you linked should fit fine.
I installed a nipple in the manifold right below the carb mounting. Mine had a pipe plug installed from the factory. Yours probably does as well.
__________________
67 C10 283 T5 swapped longbed fleetside = wife's daily driver 67 C20 292 (originally a 250)4speed longbed fleetside w/original wooden bed=my project truck 67 C10 283+.060 (so a 292 as well)T5 swapped longbed fleetside=my DD 72 C1500 Sierra Grande 350 TH350 longbed fleetside=wife's fair weather truck Can you tell we are fans of longbed fleetsides & 67s Chris |
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#21 | |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
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Re: MC/Booster conversion
Quote:
Maybe I missed your reply- what time is the cruise?
__________________
~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#22 | |
Registered User
Join Date: Apr 2022
Location: Moorpark, CA
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Re: MC/Booster conversion
Quote:
and the Simi cruise is 4-8p 1st Saturday @ Rock n Roll cafe on Tapo St another local is 1st & 3rd Saturday 7a-10a at Firestone Tire in TO mall parking lot lynn & Hillcrest |
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#23 | |
Who Changed This?
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Location: Simi Valley, CA
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Re: MC/Booster conversion
Quote:
TO in the morning would be more doable. Do they allow scruffy old camper trucks? ![]() That Camaro is nice! I had a '69 RS with a 327 and 4 speed, power steering, a radio and gauges. Black/Orange with a black interior; talk about hot with no AC.
__________________
~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#24 |
Registered User
Join Date: Apr 2022
Location: Moorpark, CA
Posts: 758
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Re: MC/Booster conversion
Olds51Sedan...that is one cool engine bay. Yeah it appears the small air cleaner will be the ticket for the 11" booster
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#25 |
Registered User
Join Date: Apr 2022
Location: Moorpark, CA
Posts: 758
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Re: MC/Booster conversion
Did the CCP Power Booster swap. Replaced calipers/pads, all soft hoses, wheel cylinders and rear brakes. Truck stops really well now.
The MC/Booster combo was a direct fit. Has adjustable rod to pedal so I lowered the pedal some to give me knee room applying brakes without hitting column shifter The 6 1/2" filter clears easily from the booster. Plumbed the breather into it |
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