604- purpose of ports

[steelkiwi75]

on the front of the intake there are two holes right under the thermostat housing. one looked to be 1/2 or 3/4 and the other 1/4 or 3/16. whats their purpose? also do you run the thermostat provided or what size restrictor is best?

[steelkiwi75]

noone will answer my questions

[dirty white boy]

this info is being discussed a few threads down the bored by very knowledgeable folks...