99 cobra undrive pulley help

Hi,

I can not believe what happened but my crankshaft bolt fell out . I guess my mechanic did not use lock tight on the bolt. I want to know if anyone can please tell me what size length diameter bolt this would be. So I can go to the hardware store and pick up another. I have steeda underdrive pulleys

Please help!

crankshaft pulley bolt

Thanks UM can anyone please help. The grade of bolt and lenth diameter and size
for 99 cobra mustang crank pulley

Thanks

Thanks guys I went to ford and they had the correct one in stock. so I picked it up for a few bucks.


On to another matter. I have not started my car in a while because I have been doing some bolt ons .

Ie
bassani headers
underdrive pulleys
powdercoated my valve covers and upperintake
Maximum motorsport stop hop kit
eibach pro springs
tokico adj shocks and struts
sct MAF
JLT cold air intake
Egr
fuel filter
Iam also intalling aluminum drive shaft
changed the oil
flushed the the coolant
instfalled meziere electric waterpump
My question is what should i watch out for when I go start it up for the first time any steps to take first
Can I run it with just the headers on the car I went with bassani ceramic coated equal length. I also used a fuel stabilizer and its been sitting on jack stands for about 1 month. Please help