Magnum Exhaust Manifolds in an A Body
...regarding port sizes and sealing to a magnum head, another bit I can offer into the discussion pool is I just finished firing up my 02 Dakota - it retained its mag 360 and now has an Eddy 7577 and Holley 2bbl Sniper (w/ adapter). To keep things simpler with the exhaust routing and such around the 4x4 oil pan and linkage, I opted for a set of early 70's pre-smog 318/360 center dump truck manifolds (4041466 d-side x2), which so far seal up good (with magnum gaskets). I don't think the ports are quite as big as 340 ports...?...but so far these are sealing up good. These were blasted and Cerakoted - seems to be pretty nice.
...regarding port sizes and sealing to a magnum head, another bit I can offer into the discussion pool is I just finished firing up my 02 Dakota - it retained its mag 360 and now has an Eddy 7577 and Holley 2bbl Sniper (w/ adapter). To keep things simpler with the exhaust routing and such around the 4x4 oil pan and linkage, I opted for a set of early 70's pre-smog 318/360 center dump truck manifolds (4041466 d-side x2), which so far seal up good (with magnum gaskets). I don't think the ports are quite as big as 340 ports...?...but so far these are sealing up good. These were blasted and Cerakoted - seems to be pretty nice.