Quote:
Originally Posted by lizziemeister'sV6
Looking at getting a used/rebuild MSD 6a for my 351 V6 - there are 3 different models of 6a which of 2 are for street/strip. The model 6200 is for 4-6-8 Even Fire motors and the Model 6246 is for Odd-Fire V6 - I know of Buick odd-fires that was used in the older Jeeps - would the GMC V6 be Odd-fire since there are people who rebuilt the Buick disturbtors for there GMC V6's to get HEI - only question I really need to know is the GMC V6 odd or even fire.  - Cliff |
The GMC V6 is an even fire engine. This is due to the 60° angle of the block. The Buick V6 has a 90° angle on the block which is why it is an odd fire engine. Some of the later Chevy V6 even fire is a 90° angle block but the crank rod journal (where the two rod come together on a common journal) is shifted 15° to make it an even fire engine. The early Chevy V6 is an odd fire because the crank was not shifted 15°.