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82 GT · 08-30-2005, 07:14 PM

Add some more advance. I would start at 10* and go in 2* increments until vacuum reading is maxed out at idle.
You have the next step up cam that I have. I have the 274XE cam.
That cam, in that 408, should have tons of torque through the rpm range.

Yes, you can disconnect the brake boost for a leak test.
Here is a helpful link to diagnose possible problems by using a vacuum gauge: http://www.tradervar.com/Engine%20Pe...um%20Gauge.htm

08-30-2005, 07:14 PM	#4
82 GT Import Slayer Join Date: May 1999 Posts: 2,241	Re: 408w running poorly Add some more advance. I would start at 10* and go in 2* increments until vacuum reading is maxed out at idle. You have the next step up cam that I have. I have the 274XE cam. That cam, in that 408, should have tons of torque through the rpm range. Yes, you can disconnect the brake boost for a leak test. Here is a helpful link to diagnose possible problems by using a vacuum gauge: http://www.tradervar.com/Engine%20Pe...um%20Gauge.htm __________________ '82 GT 351W (.060)Comp Cams 274* Extreme Energy cam, ported & polished heads w/ 1.94/1.60 valves 10.3:1 flat top pistons,stealth intake, Mallory dizzy,Holley 750dp carb, BBK shorties,Flowmaster exhaust,C-4 with 3700 stall converter, B&M pro shifter,8.8 rear, 4:10's, subframes, electric fan, powermaster alternator, 4 core radiator.