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Old 07-14-2008, 11:55 PM
150aintenuff 150aintenuff is offline
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the "camel hump" heads are 99% crap especially for a 350 CID motor, those heads were designed for a 327 CID motor MAX, the 1.94/1.50 valves limit flow, as do the 165CC intakes and 65CC exhaust runners, on a 355 CID engine those heads cannot support even a MILD 256 duration cam and if those heads are unmodified have a .455" lift maximum dump the heads, get a set of AFR 195's based off the L98 castings, 2.08/160 valves, and at a 10.4:1 ratio the iron heads make 92 octane a borderline minimum with 93-94 being almost a requirement to avoid detonation, where as aluminum heads make 10.5:1 a 89 octane streetable engine as for cam, EVEN A STOCK CAM can build 350-400 HP..... its all abot head setup and intake and exhaust flow through the heads, more so than a BIG BUMPY cam.... PERSONALLY

heres a perfect street motor in 355CID trim

10.5:1 ( flat tops with 62CC heads)
NX256R Nitrous Roller cam
AFR 195 with 2.08/1.60 Gasket matched and ported
Edlebrock Vic JR Port Matched and Flowed to match heads
Holley or Edlebrock 750CFM carb on 2" wooden or other heat insulating spacer
1-3/4" primary headers, to a 3" collector 3" H piped exhaust

done right that combo is potent up to almost 450 HP at 5500RPM, and with a "stock" ZZ4 cam its in the ballpark of 400... and has a very streetable even with full power accessories at over 20" vacuum
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