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A friend and board member did the magnum head swap. Kept his LA intake so had to drill the heads. But wow, that 318 with those heads would have slapped my bone stock 360 sideways so bad it would have been like I left the emergency brakes on. IfI had driven that 318 car before putting my 408 in the works, I'd have just gone that route I think. If you can do the head swap, that really will give a lot of both ponies and saves $$$ on intakes.
the old engine in my 5th ave was a stock pistoned 360 with a comp XE262, home ported 1.88 heads, headers, 600 eddie, and an RPM air gap, comp ratio was a tad under 8:1, ran hard on 87 octane, got 15mpg mixed
the new engine is the original 318 shortblock, magnum heads home ported by me, the same headers, intake and carb as the 360, a bullet 259/316 lobe hydraulic roller cam (10 degrees less .050 duration, 3 degrees less .2 duration than the comp XE262). comp ratio is 9:1, runs just as hard as the 360 on 87 octane, gets 17.5mpg combined.
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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