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Old 04-13-2000, 10:57 PM
shannon shannon is offline
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Location: Turkey Creek La, US
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I was wondering if anybody out there has built a 340 with a 360 crank. KB hypertech makes pistons for this combination. However, the quench pistons that produce 9.5:1 compression require that the rod be narrowed to 1 inch. The idea of doing any narrowing to a rod sounds crazy, especally if you want to spin the engine 6000 rpm's. Anyway, any suggestions or imput would be greatly appreiceated.
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Old 04-14-2000, 12:17 AM
Tony W Tony W is offline
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Location: Winchester, Ohio
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Have the 360 cranks mains turned down to the 340 size(use 340 bearings now). Use any 360 piston, I suggest the KB107. Now your original 340 bore is 4.04 which is a .040" overbore for a 360. Use the 4.070" piston and have your block takes +.030" to match. remember this is a cast crank, plenty strong but externally balanced. With new pistons, have it rebalanced. Couple this with a fresh set of pocket ported heads, RPM intake, 750 Holley or Carter(my choice) and a good cam(MP .484" a good choice, second choice would be the Edelbrock.480" RPM cam) and you'll have a thumper of a street motor! This will make 400 h.p.
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