I'm doubting a stroker would even run at all with the cam 180 out, but I guess anything's possible. I would first verify your timing by indexing your dizz to #1 and probing the #1 spark plug hole to make sure you're at TDC and both valves are closed. Verify your firing order again, just like you were doing everything from scratch.....assume nothing is correct.

Make sure you're cam doesn't have something unusual specified like a 4-7 swap and also it's key to know that timing for most strokers won't fall out of a tree if the initial timing is too low, most of my motors want around 22 initial and then a realitively slow centrifugal limited to 12-14 max. Too low a timing and the motor will run like warmed over crap no matter how good the parts are.

Make sure you didn't suck a big slug of rust or dirt into your fuel line....if in doubt blow it out and verify free flow to the bowls. check your needle and seat that there's no debris there too. Pull the valve covers and turn it over, If I know it's all good I usually do the screwdriver to starter relay 'jumper' trick just so I can verify the valves and firing order, but it's better to slip a big wrench on the crank pullay and do it slowly by hand. Go slow and make 100% all valves are seating (if cam timing was bad off something could have hit) by rocking the arms at TDC...again assume nothing and that anything could be the culprit. Lash ands preload can still be a bear if you're out of practice....even if you know you know what you're doing.

try those things and then come back...we'll go to the next level from there.