I am hoping to get some help here regarding my Pontiac 400 combination. I have a 76 400 that was built and put into a 1981 T/A. The idle is so rough that I can barely tune it. I really want to drive it as a daily driver.
Here is a list of parts in it as of today:
76 400 block .030 over
400 crank .030 over
Pistons are TRW2262F30
6x heads ported and intake matched 1.77/2.11
Roller rockers 1.5:1
Hydraulic lifters
RPM Performer Intake (matched to head intake)
Lunati Camshaft .534/.534
3:73 rear
Drive shaft balanced
TH-350 Trans with shift kit
27" 4 row radiator w/tranny cooler
Hooker Comp headers
Roller Timingchain
MSD Ignition Control 6A
Edelbrock 750CFM carb
Stall converter (no idea)
Mechanical Fuel pump
I have no idea what the timing is set at.
With all that said, the car is sluggish, idle is rough, it does not start very well, i usually need to pump the gas like crazy or even add gas down the carb if it gets driven once a month. When you floor the gas, there is a hesitation like the car is losing power.
There seems to be so much wrong with it that I don't know where to start.
Some friends have said that the cam is too big. Others say that the original 3.08 gears should have been left in. And some point to the carb as not being the right fit.
I am open to your suggestions.
Dave
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