250 inline six question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1967chevy c10 · 06-27-2014, 09:00 PM

I'm thinking bout building my 250 inline six in my truck. I have a 350 I wanting to build for it. But till I get it build I want to beaf up the 250. I want to port and polish the head put a comp cam 260h in it and put a intake on it an 4 barrel carb. Plus headers Have anyone use the flow tect headers and can they bolt right up with my stock intake.

rdgt67 · 06-28-2014, 12:15 AM

I am about to j but all the same headers on mine. I am told the stock intake will work as the exhaust manifold is bolted to it. flowtech are at a good price. Should be starting on mine in v about a week.

**'68OrangeSunshine** · 06-28-2014, 01:36 AM

I have a 292 L6, but went about that same route: Edel-1404 [500 CFM] Offy intake, Clifford headers -- Badger pistons at .030 over, Crane 260H cam, intake valves for the 307 V8 (1.84"), Pertronix Ignitor II distributor.
I didn't do much more to the head than the bigger intake valves, but Larry Page [Twisted6 on this forum] is an expert on the Lump Port modification.
Once you get your L6 set up right, you may think twice about adding the extra weight of a V8.

Shaky · 06-28-2014, 04:50 AM

This might be worth reading:

Codez67Chevy · 06-28-2014, 11:31 AM

Awww yes that man is a genius! I have his second book. Tons of info to get lots of usable power.

rdgt67 · 06-28-2014, 06:20 PM

Any one running multiple one barrels? If do what kind

nascarguy320 · 06-28-2014, 07:11 PM

I have a 68 with a 250 and I just got the clifford intake and headers but i went with the dual 38 webber carbs and its a very nice set up.

davepl · 06-28-2014, 07:31 PM

You can do it for fun, you can do it to be different, but don't do it to be fast. You could bolt twin turbos onto one of our L6s and they'd still run 18 in the quarter :-)

I had a buddy with a 65 Chevy Van that built the 6 in it. The only scary part was it'd get up to about 240F and he'd open the engine cover (between the seats!) to help cool it as we drove. I was ready at any time for an instant scalding - not something I'd do now!

Which brings me to my point: don't wreck your driveability in pursuit of speed, because you won't get speed, so keep the driveability. It can still look cool though!

rdgt67 · 06-28-2014, 07:35 PM

Not after speed. After the cool look. I always wanted a 6 with duals and headers. Just ordered the headers. After multiple carbs now. Thought about 3 ones but don't know about sync ing them.

rdgt67 · 06-28-2014, 09:36 PM

Does anyone have a picture of flowtech headers installed on a 250 6cyl??

06-27-2014, 09:00 PM	#1
1967chevy c10 Registered User Join Date: Jan 2014 Location: charlotte Posts: 17	250 inline six question I'm thinking bout building my 250 inline six in my truck. I have a 350 I wanting to build for it. But till I get it build I want to beaf up the 250. I want to port and polish the head put a comp cam 260h in it and put a intake on it an 4 barrel carb. Plus headers Have anyone use the flow tect headers and can they bolt right up with my stock intake.

06-28-2014, 12:15 AM	#2
rdgt67 Registered User Join Date: May 2014 Location: Granbury texas Posts: 96	Re: 250 inline six question I am about to j but all the same headers on mine. I am told the stock intake will work as the exhaust manifold is bolted to it. flowtech are at a good price. Should be starting on mine in v about a week.

06-28-2014, 01:36 AM	#3
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,439	Re: 250 inline six question I have a 292 L6, but went about that same route: Edel-1404 [500 CFM] Offy intake, Clifford headers -- Badger pistons at .030 over, Crane 260H cam, intake valves for the 307 V8 (1.84"), Pertronix Ignitor II distributor. I didn't do much more to the head than the bigger intake valves, but Larry Page [Twisted6 on this forum] is an expert on the Lump Port modification. Once you get your L6 set up right, you may think twice about adding the extra weight of a V8. __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.

06-28-2014, 04:50 AM	#4
Shaky Six in a row makes it go... Join Date: Mar 2009 Location: Vacationland: Maine Posts: 1,346	Re: 250 inline six question This might be worth reading: Attached Images __________________ 67 C20 long step resto: http://67-72chevytrucks.com/vboard/s...d.php?t=342086 66 C10 long step build: http://67-72chevytrucks.com/vboard/s...=1#post3814790 CT to Alaska in a 67 C10: http://67-72chevytrucks.com/vboard/s...d.php?t=399224 “The height of sophistication is simplicity." - Clare Boothe Luce

06-28-2014, 11:31 AM	#5
Codez67Chevy Registered User Join Date: Nov 2012 Location: Spanish Fork Ut Posts: 370	Re: 250 inline six question Awww yes that man is a genius! I have his second book. Tons of info to get lots of usable power. __________________ " Dead Pumpkin" 67 Chevy short bed, 292 I6, 4spd manual. Fan of the "Slant Noses". 93' Toyota pickup 2WD 2dr and 32mpg. Daily driver. 300k+ Members I've met... Mister-B

06-28-2014, 06:20 PM	#6
rdgt67 Registered User Join Date: May 2014 Location: Granbury texas Posts: 96	Re: 250 inline six question Any one running multiple one barrels? If do what kind

06-28-2014, 07:11 PM	#7
nascarguy320 Registered User Join Date: Jun 2013 Location: Hemet,Ca. Posts: 89	Re: 250 inline six question I have a 68 with a 250 and I just got the clifford intake and headers but i went with the dual 38 webber carbs and its a very nice set up.

06-28-2014, 07:31 PM	#8
davepl Registered User Join Date: Aug 2006 Location: Redmond, WA Posts: 6,332	Re: 250 inline six question You can do it for fun, you can do it to be different, but don't do it to be fast. You could bolt twin turbos onto one of our L6s and they'd still run 18 in the quarter :-) I had a buddy with a 65 Chevy Van that built the 6 in it. The only scary part was it'd get up to about 240F and he'd open the engine cover (between the seats!) to help cool it as we drove. I was ready at any time for an instant scalding - not something I'd do now! Which brings me to my point: don't wreck your driveability in pursuit of speed, because you won't get speed, so keep the driveability. It can still look cool though! __________________ 1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible

06-28-2014, 07:35 PM	#9
rdgt67 Registered User Join Date: May 2014 Location: Granbury texas Posts: 96	Re: 250 inline six question Not after speed. After the cool look. I always wanted a 6 with duals and headers. Just ordered the headers. After multiple carbs now. Thought about 3 ones but don't know about sync ing them.

06-28-2014, 09:36 PM	#10
rdgt67 Registered User Join Date: May 2014 Location: Granbury texas Posts: 96	Re: 250 inline six question Does anyone have a picture of flowtech headers installed on a 250 6cyl??



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