[jar0000]

How much vacuum should I have at idle with a stock 265?

 

[reborn55]

everything in good shape--17-20 inches of vacuum

 

[straycat]

I don't think it matters what size cube motor it is but reborns rite V-8 usually run 17-22 at sea level if all is well, valves, timeing, vacume lines, etc. Lon

 

[dseale4888]

Most any stock engine will have that kind of vacuum. It is when you start putting the wild cams in that you start to loose vacuum.
Dave

 

[Ronald L. Stanford]

Vac!!!!

If you get that many HG that motor will have to be brand new!!!! and maybe just maybe you might get sixteen. Remember you got built in vaccuummmmmm leaks even in that year.
Guess whooooooo