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You need a vacuum gage, hook it to a vacuum port that has constant vacuum. It should have about 19 to 25 inches of vacuum at idle for a stock engine if the timing is set correctly. Now quickly snap the throttle wide open the gage should drop to about 5 then back to where it was. You can also set the timing by adjusting the distributor so you get highest vacuum reading.
What else can I help you with?
Chevy 350 stalls?
check for vacuum leaks
How do you time a 350 Chevy if there is a mark on the balancer but the pointer is missing thanks?
get a pointer ==Answer= try using a vacuumm gauge hook the guage up to where the distributor is plugged into start the engine advance the distributor until the vacuum guage stops climbing the back it off one degree good luck
Why is my Chevy 350 sputtering?
allot of reasons check the carb. check for vacuum leaks. check the timing. check the comp codes.
Chevy 350 shuts down when put in reverse?
Check all vacuum lines.
1974 Chevy 350 motor starts but then quits?
check your rotor & pickup coil
Where is the transmission fluid fill cap on the Chevy 350?
Same place you check the level.
Placement of the number one plug wire 88 Chevy 350?
check out this link
Why does your Chevy 350 got no fule on pistons 1357?
Check the injector (inside the throttle body)
Is the starter on a 1970 Chevy 350 different from a 1978 Chevy 350?
no
Will a distributor from a 90 Chevy 350 work in a 99 Chevy 350 vortec?
NO.
Will a 1995 Chevy 350 and a 1989 Chevy 350 have the same wiring?
YES.
How do you check my Chevy 350 5.7 ID number?
Sometimes you can find information at mortec.com and http://www.nastyz28.com/chevy-engine-code-stampings.php
