You will only need a few parts, some easier to obtain than others. Booster for 8MM, a front cartridge guide, and the most difficult at this time is the 8MM barrel. 30calmachinegunner can modify a 308 booster and cartridge stop for you, but 8MM barrels are a problem. Lucky#13, a few others, and myself have tried to get a run made without success. Barrel companies do not want small runs. Post a "wanted to buy" thread and possibly obtain one that way.
I'll patiently re-size and trim brass, re-prime, charge w powder, and seat bullets.