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mrein3 · 03-30-2006, 08:31 AM

Here is what I had on my 350 4x4. I took them off, cleaned them up, and bolted them on my 383.

Neither one has a heat riser. Both are chamfered to accept the exhaust donut. I have seen one center dump manifold that does not have the chamfer for the exhaust donut. I would guess that truck used a heat riser.

BTW, I ordered the dual exhaust kit from LMC. It bolted right up to these manifolds with no modifications.

03-30-2006, 08:31 AM	#8
mrein3 Registered User Join Date: Feb 2000 Location: Center City, MN, USA Posts: 3,254	Re: 283 Exhaust Manifolds... Here is what I had on my 350 4x4. I took them off, cleaned them up, and bolted them on my 383. Neither one has a heat riser. Both are chamfered to accept the exhaust donut. I have seen one center dump manifold that does not have the chamfer for the exhaust donut. I would guess that truck used a heat riser. BTW, I ordered the dual exhaust kit from LMC. It bolted right up to these manifolds with no modifications. Attached Images __________________ '70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN