and yet more 6cyl questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

davidh · 01-28-2009, 04:03 PM

Hmm was just wondering can headers be run with the 1bbl carb and stock intake? Just block off that lower port? anyone done it before? Ive read the exhaust is the thing choking these motors the most.
Also exactly where are the block numbers by the distributor of these motors? can someone show a pic? Id hate to think I've found a 250 only to be 230 or worse a 194.
and finally is 66 the last year of the scribed cheverolet valve cover?

64GMCHorsepower · 01-28-2009, 10:23 PM

I tried to run headers and block off the port, but there wasn't enough room with the integrated head....You can find a non-integrated head, and then get a Clifford or Offy intake, and then run headers....

Maybe someone else will chime in if they had any luck doing it.

davidh · 01-29-2009, 01:01 AM

no these would non integrated head

70c-10 · 01-29-2009, 05:10 PM

It seems like it would work, although I've never heard of anyone else doing it.

You might want to ask your question over on inliners.org. You'd probably get more input over there.

davidh · 01-29-2009, 08:13 PM

can someone show me where the casting numbers are located? I cant find them by the distributor.

Heater63 · 01-30-2009, 01:39 AM

One thing I keep reading about when putting headers on the straight six is to use something to heat the floor of the intake manifold to keep the fuel from puddling. Check out the Inliners site, Clifford Engineering, and Leo Santucci.

And it's not just the exhaust, its the head too that doesn't breath as good as it can with some modifications (removing head bolt bosses in the siamesed ports).

In addition to headers, Find a used Offy or Clifford intake manifold, a small 4bbl carb or even a 2bbl, and USE AN HEI distributor. That will wake up the L6, wether it is a 230, 250, or 292.

good luck.

Heater63 · 01-30-2009, 01:45 AM

And telling a 230 from a 250 is impossible to me...and some block casting numbers were used on both motors. I've heard the 230 uses a flat top piston, and the 250 uses a D shaped dished piston like the 292. Pull a spark plug at top dead center and see if you can tell which piston it is.

If you can find a 292, that is the engine to have; a stroker = ton of torque. It's easy to spot with its tall deck/6" high lifter covers, different engine mount location/ fuel pump location.

Again, good luck.

ol Curt · 01-30-2009, 06:24 PM

Quote:

Originally Posted by davidh

can someone show me where the casting numbers are located? I cant find them by the distributor.

There is a flat spot just behind (toward firewall) distributor.

davidh · 01-30-2009, 08:12 PM

I found them and feel like a numbskull for not seeing them. thanks

01-28-2009, 04:03 PM	#1
davidh Senior Member Join Date: Feb 2004 Location: Ponca city now kingfisher Oklahoma Posts: 1,220	and yet more 6cyl questions Hmm was just wondering can headers be run with the 1bbl carb and stock intake? Just block off that lower port? anyone done it before? Ive read the exhaust is the thing choking these motors the most. Also exactly where are the block numbers by the distributor of these motors? can someone show a pic? Id hate to think I've found a 250 only to be 230 or worse a 194. and finally is 66 the last year of the scribed cheverolet valve cover? __________________ Even the nicest dodge-chrysler is only 2years away from being parked outside of Section 8 housing.

01-28-2009, 10:23 PM	#2
64GMCHorsepower Justified! Join Date: Apr 2007 Location: Valencia, Ca Posts: 1,366	Re: and yet more 6cyl questions I tried to run headers and block off the port, but there wasn't enough room with the integrated head....You can find a non-integrated head, and then get a Clifford or Offy intake, and then run headers.... Maybe someone else will chime in if they had any luck doing it. __________________ Chad 1964 GMC Fleetside Shortbed....350/700R4 tranny

01-29-2009, 01:01 AM	#3
davidh Senior Member Join Date: Feb 2004 Location: Ponca city now kingfisher Oklahoma Posts: 1,220	Re: and yet more 6cyl questions no these would non integrated head __________________ Even the nicest dodge-chrysler is only 2years away from being parked outside of Section 8 housing.

01-29-2009, 05:10 PM	#4
70c-10 Registered User Join Date: Oct 2005 Location: redlands, ca Posts: 112	Re: and yet more 6cyl questions It seems like it would work, although I've never heard of anyone else doing it. You might want to ask your question over on inliners.org. You'd probably get more input over there. __________________ 6 in a row, makes it go!!! My Car '88 SWB Daily Driver

01-29-2009, 08:13 PM	#5
davidh Senior Member Join Date: Feb 2004 Location: Ponca city now kingfisher Oklahoma Posts: 1,220	Re: and yet more 6cyl questions can someone show me where the casting numbers are located? I cant find them by the distributor. __________________ Even the nicest dodge-chrysler is only 2years away from being parked outside of Section 8 housing.

01-30-2009, 01:39 AM	#6
Heater63 Registered User Join Date: Dec 2007 Location: N Texas Posts: 580	Re: and yet more 6cyl questions One thing I keep reading about when putting headers on the straight six is to use something to heat the floor of the intake manifold to keep the fuel from puddling. Check out the Inliners site, Clifford Engineering, and Leo Santucci. And it's not just the exhaust, its the head too that doesn't breath as good as it can with some modifications (removing head bolt bosses in the siamesed ports). In addition to headers, Find a used Offy or Clifford intake manifold, a small 4bbl carb or even a 2bbl, and USE AN HEI distributor. That will wake up the L6, wether it is a 230, 250, or 292. good luck. __________________ 292 + TKO500

01-30-2009, 01:45 AM	#7
Heater63 Registered User Join Date: Dec 2007 Location: N Texas Posts: 580	Re: and yet more 6cyl questions And telling a 230 from a 250 is impossible to me...and some block casting numbers were used on both motors. I've heard the 230 uses a flat top piston, and the 250 uses a D shaped dished piston like the 292. Pull a spark plug at top dead center and see if you can tell which piston it is. If you can find a 292, that is the engine to have; a stroker = ton of torque. It's easy to spot with its tall deck/6" high lifter covers, different engine mount location/ fuel pump location. Again, good luck. __________________ 292 + TKO500

01-30-2009, 08:12 PM	#9
davidh Senior Member Join Date: Feb 2004 Location: Ponca city now kingfisher Oklahoma Posts: 1,220	Re: and yet more 6cyl questions I found them and feel like a numbskull for not seeing them. thanks __________________ Even the nicest dodge-chrysler is only 2years away from being parked outside of Section 8 housing.



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