I would use 3/8" by 6" long. That gives you 2" in the concrete 3" in the wood, and an inch for your washer and nut.
10mm 12 point
You do not need special bolts. Standard bolts and screws, as long as they are the correct size, can be used.
A 20mm or 13/16 drill bit will allow the bolt to fit through.
should if the size matches up all u need is a adapter kit (plate) to align the bolts up to the housing. No.
18mm
You need 54mm bore bolts for a caliper for a 1998 Chevy Prism.
On the drums there are two holes. You need to insert two to bolts (size 10 metric) in to the holes as yoo tighten the bolts it pushes the drum off. bolts need to be about 3 inches long. i could be wrong about the bolt size
Oil pan to Timing cover bolts are 8mm to remove them. as for replacing the bolts if they are lost, Metric 6.0 x 1.0 i believe
T55
You will need 8 bolts with 5/8" diameter, and 3 1/2" in lenght.
Special bolts! Do not replace with generic will fit bolts! But the head size on my car is 18 MM
Behind the brake caliper plate are to holes. You will see a label that says loosen. Loosen the brake shoes from the drum by pressing in the adjustment wheel locking plate and then spinning the adjusted wheel away from the caliper plate. Only need to spin the adjustment wheel a couple of turns. On the front side of the drum. Remove the two 14mm bolts that holds the drum on during manufacturing. There are two different holes, on the front of the drum, that have thread. I do not remember the size of the bolt, but the tread is the same size as the first two bolts that were first removed. Take those bolts to the hardware store and get two more like them except they need to be 4inchs long. Thread the bolts into the other two holes and tighten each a little at a time and the hub will slide right off.