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New Forum Added in Parking Lot
EARLY BOLTS
1916 - 1936
1928 Chevrolet AB Canopy Express
"Justin"
Discussing issues specific to the pre-1937 trucks.
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Jan 21st, 2020
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Joined: Nov 2021
Posts: 781
OP
'Bolter
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I just found the first drawback of a BP engine. They have proprietary heads that require a different design for exhaust/headers. I have the 383 SB. it has a straight plug vortec style design.
I was hoping to use my ram horns, but while the holes line up the manifold itself hits the block and valve cover before it can get tight. This will force me to go headers or fab some type of spacer with a gasket on each side.
I am exploring both right now. Funny part is out of the three places that offer headers for the BP engine only one is reasonably priced relatively speaking.
Sanderson comes in at $650 for ceramic coated 3/4 length.
Headman comes in at $2300 for ceramic 3/4 length.
Lemon comes in at $2500. Only long tube available.
I have tried fitting a couple different manifolds and headers which do not play nice with this head. I am now talking to my local machinist who has taken a liking to this project to see if building a spacer for my ram horns is feasible.
Thoughts?
Last edited by Ferris Bueller; Fri Jan 20 2023 07:36 PM.
1966 C-10 Step Side. 283, 4spd, 3.73 gear. 60K miles prior to restoration. 507 Paint Code. Currently in 10,000 pieces, but it's starting to go back together.
Rear Suspension is done! Wheels are done! Bed bodywork is done! New 383 and TKO 5 speed in place.
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Joined: Oct 2021
Posts: 2,506
'Bolter
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1939 Packard Standard Eight Coupe (The Phantom)
1950 Chevrolet 3100 (Ol' Roy)
1956 Cadillac Coupe de Ville (The Bismarck)
1966 Oldsmobile Toronado (The Purple Knif)
1966 Ford Mustang (Little Red)
1964 Ford Galaxie 500 coupe
1979 Ford F-100
1976 Ford F-150 (Big Red)
1995 Ford F-150 (Newt)
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Joined: Dec 2008
Posts: 1,950
'Bolter
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You don't need a machinist.
Get 4 each 3/8" flanges (2 each size = 3/4").
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Joined: Feb 2016
Posts: 951
'Bolter
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I think he is referring to an aftermarket builder known as "Blue Print" engines.
1957 Chevrolet 5700 LCF 283 SM420 single speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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Joined: Oct 2021
Posts: 2,506
'Bolter
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1939 Packard Standard Eight Coupe (The Phantom)
1950 Chevrolet 3100 (Ol' Roy)
1956 Cadillac Coupe de Ville (The Bismarck)
1966 Oldsmobile Toronado (The Purple Knif)
1966 Ford Mustang (Little Red)
1964 Ford Galaxie 500 coupe
1979 Ford F-100
1976 Ford F-150 (Big Red)
1995 Ford F-150 (Newt)
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Joined: Feb 2000
Posts: 4,653
'Bolter
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Spacers are the way to go, should be pretty easy to come up with. Two shim style gaskets per port with some high temp sealer if needed. Give them a sanding on a flat surface. Anyone with a cnc plasma cut table could whip them out in a few minutes.
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Joined: Sep 2009
Posts: 2,617
Gearhead, Moderator for The Swap Meet and General Truck Talk
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Ferris, You can get mild steel 3/8" thick basic header flanges from lots of vendors. Here is just one (not mine): https://jamoperformance.com/univers...zyvbY_AIVQiytBh0C5QckEAQYBSABEgJKqfD_BwEIf you want stainless steel instead of mild steel, the same vendor lists them for $66 each. Many other possible sources out there for you to choose from. Dan
Dan
1951 Chevy 3 window 3100 (My Grandpa's hunting truck)
1966 Chevelle (Wife's Hot Rod)
2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998)
Com Fac Maint Lead Tech Retired (1998-2021)
Finely time to get to work on my Grandpa's (now mine) truck!
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Joined: Feb 2004
Posts: 26,348
Kettle Custodian (pot stirrer)
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Get a machinist with a surface grinder to put a slick, flat finish on the spacers and you won't need gaskets. Just keep the manifold bolts tight.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!"
Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self.
Ernest Hemingway
Love your enemies and drive 'em nuts!
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Joined: Nov 2021
Posts: 781
OP
'Bolter
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You don't need a machinist.
Get 4 each 3/8" flanges (2 each size = 3/4"). I think all I would need is 3/8. Would never have thought you could simply buy a flange. Learn something new every day. Thank you.
1966 C-10 Step Side. 283, 4spd, 3.73 gear. 60K miles prior to restoration. 507 Paint Code. Currently in 10,000 pieces, but it's starting to go back together.
Rear Suspension is done! Wheels are done! Bed bodywork is done! New 383 and TKO 5 speed in place.
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Joined: Nov 2021
Posts: 781
OP
'Bolter
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Well, after weighing all the options and costs, I ordered a set of headers.  Onto purchasing AC and PS in a week so I don't overwhelm my wife with the CC statement.
1966 C-10 Step Side. 283, 4spd, 3.73 gear. 60K miles prior to restoration. 507 Paint Code. Currently in 10,000 pieces, but it's starting to go back together.
Rear Suspension is done! Wheels are done! Bed bodywork is done! New 383 and TKO 5 speed in place.
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