69 c10 trailing arm nuts

[rick0312]

any suggestions on removing the nuts from the rear trailing arms. I have been hitting all the nuts with penetrating oil for the last week. I plan on using a breaker bar, but the nuts that connect the arms to the mid frame brace are a little hard to get to. has anyone had any success just cutting these bolts off? If they were cut what did you use to cut the nuts? also, does anyone know the sizes of these nuts that connect the trailing arm.

thanks