ram horn casting number - help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Model 12 · 09-15-2002, 08:39 PM

Ladies and gents

I took off my driver's side exhaust manifold today (hole in it) and need to replace it (duh). The unit I took off was way rusty and the number was xxx2473 (possibly xxx2478). The 2473 is supposed to be a 69-70 307/350. That's weird, as I thought this engine was unmolested, as it has the right engine dates and suffix. Even has the original hot air intake system on the driver's side. The exception is the RH side ram horn...it is a straight down dump (wrong). Possible the manifolds were replaced in it's history, or even headers (yuck).

Anyway, I have an extra LH manifold, but it's number is a 3932468, which I don't find listed. Possible it is a 3932469, which is listed.

Can anyone advise me if this is a "useable" manifold...looks useable....truck is a 72 C-10, 350-175, TH350 with AC, no A.I.R.

Anyone advise on this setup? Thanks, Dave

**jerry moss** · 09-15-2002, 09:21 PM

very possible the manifolds were replaced more than once in 30+ years. the ramhorn design was notorious for "blowing out" right in the middle. i believe all new manifolds from G.M. come with A.I.R. holes that must be plugged.

Dandeluxe · 09-15-2002, 09:39 PM

Jerry, ibought brand new corvette manifolds real cheap from modern chev. they are 2.5 inch and rock their toll free no. is 1-800 722-4828 and their website is oldmusclecars.com
check them out it improved performance on my truck a lot. good luck , DAN
PS, I HOPE THIS INFO. HELPS MODERN CHEVROLET CLASSIC MUSCLE

Dandeluxe · 09-15-2002, 09:54 PM

I MEANT DAVE NOT JERRY I HOPE THIS INFO HELPS YA, DAN

09-15-2002, 08:39 PM	#1
Model 12 Registered User Join Date: May 2002 Location: Knoxville, TN Posts: 20	ram horn casting number - help Ladies and gents I took off my driver's side exhaust manifold today (hole in it) and need to replace it (duh). The unit I took off was way rusty and the number was xxx2473 (possibly xxx2478). The 2473 is supposed to be a 69-70 307/350. That's weird, as I thought this engine was unmolested, as it has the right engine dates and suffix. Even has the original hot air intake system on the driver's side. The exception is the RH side ram horn...it is a straight down dump (wrong). Possible the manifolds were replaced in it's history, or even headers (yuck). Anyway, I have an extra LH manifold, but it's number is a 3932468, which I don't find listed. Possible it is a 3932469, which is listed. Can anyone advise me if this is a "useable" manifold...looks useable....truck is a 72 C-10, 350-175, TH350 with AC, no A.I.R. Anyone advise on this setup? Thanks, Dave __________________ If James Dean had a truck, it would be a Cheyenne Super...

09-15-2002, 09:21 PM	#2
jerry moss Born Psycho Join Date: Feb 2001 Location: brentwood,cal,usa Posts: 4,936	very possible the manifolds were replaced more than once in 30+ years. the ramhorn design was notorious for "blowing out" right in the middle. i believe all new manifolds from G.M. come with A.I.R. holes that must be plugged. __________________ jerry moss 72 cheyenne super K20- tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,tow hooks,bumper guards,toolbox,aux. fuel tank,posi front and rear,plus other goodies!!! SOLD 69 suburban K20-tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,4 inch all spring lift,4 speed, 14 bolt full floater, dana 44 HD,warn winch,posi front and rear,tow hooks,plus other goodies. 73/80 chevy/gmc K20 SB400,turbo 400,205,tilt,a-c,gas hog. 77 K/5 cheyenne blazer-daily driver/beater. SON HAS IT NOW BRENTWOOD,CALIFORNIA

09-15-2002, 09:39 PM	#3
Dandeluxe Senior Member Join Date: Nov 2001 Location: st.louis mo. Posts: 717	EXHASUST MANIFOLDS Jerry, ibought brand new corvette manifolds real cheap from modern chev. they are 2.5 inch and rock their toll free no. is 1-800 722-4828 and their website is oldmusclecars.com check them out it improved performance on my truck a lot. good luck , DAN PS, I HOPE THIS INFO. HELPS MODERN CHEVROLET CLASSIC MUSCLE __________________ 1969 cst swb 350/400 th . DANNY C . ["]FRIENDS DONT LET FRIENDS DRIVE F@RD$!! 1969 cst swb corvette hugger orange with 400 hp sbc I started out with nothing and i held on to it

09-15-2002, 09:54 PM	#4
Dandeluxe Senior Member Join Date: Nov 2001 Location: st.louis mo. Posts: 717	SORRY JERRY I MEANT FOR THIS TO GO TO MODEL 12 AKA AS DAVE I MEANT DAVE NOT JERRY I HOPE THIS INFO HELPS YA, DAN __________________ 1969 cst swb 350/400 th . DANNY C . ["]FRIENDS DONT LET FRIENDS DRIVE F@RD$!! 1969 cst swb corvette hugger orange with 400 hp sbc I started out with nothing and i held on to it



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