Jerking from my Toyota

I have a 1985 toyota pickup. it has the 22r engine. I just bought a used 22r engine to put in it. The guy i bought the engine from said he just replaced the head gasket. when i got it in, the vehicle wouldnt crank. I turned the crank to tdc then looked at the distributer. the rotor was facing exactly opposite of the number 1 cylinder. which explain that. so i turned the crank one time to tdc again and the adjusted the rotor to number 1. now the engine cranks fine. I have replaced the distributer cap, rotor button, plugs, wires, battery. the truck idles fine, but when you are going about 35-45 and you go to accelerate a little, the vehicle feels like it jerks. it sounds like the engine is the one doing the jerking. it sounds like it cuts out for a sec and then comes right back in. It'll do that maybe once maybe twice in a row. could it be the camshaft is not timed right now? also when you accelerate to about 3 or 4,000 rpms in neutral and the let off, it backfires alot. could be because i have the cat. converter and muffler off(want to get new ones). Sorry i've taken up so much space. Thanks for any help any can give me. Also it is a 5 speed manual. Thanks

I have a 1985 toyota pickup. it has the 22r engine. I just bought a used 22r engine to put in it. The guy i bought the engine from said he just replaced the head gasket. when i got it in, the vehicle wouldnt crank. I turned the crank to tdc then looked at the distributer. the rotor was facing exactly opposite of the number 1 cylinder. which explain that. so i turned the crank one time to tdc again and the adjusted the rotor to number 1. now the engine cranks fine. I have replaced the distributer cap, rotor button, plugs, wires, battery. the truck idles fine, but when you are going about 35-45 and you go to accelerate a little, the vehicle feels like it jerks. it sounds like the engine is the one doing the jerking. it sounds like it cuts out for a sec and then comes right back in. It'll do that maybe once maybe twice in a row. could it be the camshaft is not timed right now? also when you accelerate to about 3 or 4,000 rpms in neutral and the let off, it backfires alot. could be because i have the cat. converter and muffler off(want to get new ones). Sorry i've taken up so much space. Thanks for any help any can give me. Also it is a 5 speed manual. Thanks

Please help me too. Got a Uno fire 11 1990 model. Replaced head gasket and had problems with idling. cylinder 1+2 was leaking and reseat the intake gasket. That problem solved I set the enjin on marking and now have problem with idling. it jerk and idle ruff. while accelerate no problem but when driving normal, enjin starts jerking again.
Please help !!!!!!