This will take 2 people. Take the #1 plug out, That will be the first plug up front on the drivers side head. Now unhook the coil wire from the coil so it won't start.
Then put your helper in the truck so he can bump the engine over with the key when you tell him. Now put your finger over the #1 plug hole and tell helper to bump the key a little at a time until you feel air blow out from under your finger and then stop blowing. As the piston is moving up and down in the cylinder you will fill it suck on your finger and then start to blow out from under your finger, as soon as it stops blowing out then that will be the compression stroke and top dead center.
It may take a few times of bumping engine over until you get the fill of it and get it right. When it's right the mark on the balancer will be at 0 on the timing mark.
And the distributor rotor will be pointin to the #1 post on the cap and at #1 cylinder.
The TDC is when the number one cylinder is at the top or top dead center of the compression.
A Chevrolet V8 engine with 3.736" bore and 3.48" stroke and tuned port injection.
Either a 305 TBI, 305 TPI or a 5.7 TPI
Depends on whether you're referring to a 305 TBI, 305 TPI, 350 TPI...
165 HP for LG4 carb 305. 190 HP for LB9 TPI 305 220 HP for L98 TPI 350
Base 305 4bbl (170 hp), optional 305 TPI (215 hp) or 350 TPI (225 hp)
Assuming you're referring to a 1988 IROC-Z, it could have either a 305 TBI, 305 TPI or a 350 TPI
700r4
TBI or TPI? 305 or 350?
6 degrees before top dead center on the 305 TPI
1986 305 TPI 190 HP / 285 Lb.Ft
The horsepower rating of the 1989 TPI 305 engine in the F body cars was 195 - 205HP The horsepower rating of the 1989 TPI 305 engine in the F body cars was 195 - 205HP