88runnergomas

How's it going new to the forum and in need of some help. I have recently did head gaskets and put about 5,000 miles on the vehicle. It started to kinda jolt randomly when accelerating and I see the rpms drop a little aND go back up. Like I said it happens randomly and is happening more frequently now. I recently did spark plugs, wires, air filter, new distributor. Still no luck any ideas?