hi helix

ive been rrunning a 355 chev with a 871 and hat nozzles.i just built a 406 with a 1071 hi helix and port nozzles.whats gonna happen?

 

at one point in time i ran a 415 ,406 neither one would ever rpm at the big end. i was running the same combo you are...we did run high 6.40's but the motor was always broke always had head problems..if you ever wanna call me feel free 1-620-249-5909 Dave I ran all the best parts money could get.as for the rpm problem I went to a smaller cid. and a heavier crank then the motor started to rpm..I sold the motor the a guy in cal. if you wanna ever call him I have his number also.also my crew cheif has all the tune ups we ran..............good luck.....if you start spending alot of $$$$$ do what I did buy a brad/ keith black motor.now running 6.0's is a walk in the park

 

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