340 6-pack ???

I to thank you for the information, will contact Promax. Trying to tune a 340 with a six-pack, all kinds of trouble with the end carbs, might be the linkage. Also just got the motor off the dyno and VERY disappointed, for a street motor with about 2600 stall converter, 10.5 compression, x-heads, looking for the right cam !!!! Any suggestions ??? Thanks.