Re: Big Block - possible timing issue (?)
You said it was 390 hp in your post.
Mine is punched .030. Intake, carb, roller cam, good valve job with Pro-Flo Manley valves, Sanderson 3” outlet manifolds. Hoping for 350 rwhp, 500+ lb/ft. But actual output not too big of a concern. Should be a hoot with 200 4R and 3.73 behind it in my 69 short step.
I bought Chevelle deep groove pulleys and a ‘70 Z/28 dual snorkel air cleaner for truck motor.
I have another 427 put together for my ‘Vette. Little more cam (230/236 @ .050) with open chamber heads so knocks compression down a point but they are ported and runn8ng 2” headers. Was in a boat that ran 56 mph with 330hp Merc 454 and ran 68 with the .060 427. Should be a legit 450 hp at crank I’d say.
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44 Willys MB
52 M38A1
64 Corvette Coupe
68 Camaro 'vert LT1 & TH700
69 Z/28 355 12.6's @110
69 Chevy Short Step 4 1/2"/7" drop
72 Jimmy 4WD 4spd 4" & 35's
02 GMC 2500HD 4x4 Duramax
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