freshly built 305 blowing gas out top of carb any ideas why.timing compression all are perfect and i have checked the heads for bent valves all are good as well as push rods and the cam is working fine.i do not know if the cam is too big since i did not put this engine together but i doubt it is .if anyone has any ideas please share this is my last option

 

When is it blowing it out or is it coming out of the bowl vent's?

 

it is coming out of the very top of the carb where it sucks the air in for the air/fuel ratio and i think it blows out when a cylinder compresses b/c it fluctuates from side to side

 

Is it blowing out at idle? If so my guess is the valves are to tight.

 

it is blowing out when i try to start it i havent even gotten it running yet but my lastest idea is that the timing may be half way out but i dont know yet i'll have to do the proper compression test on each cylinder first i wuill keep u posted

 

distributor a tooth off? maybe cam not degreed in properly?check lash? if its stock 86 balancer it could have slipped and is giving you a false TDC mark.

 

sounds like the dist. is 180 degrees out.

 

yep sounds like shes out 180 to me too. put your #1 on tdc on the comp stroke and pull your dist cap, if it aint pointing at #1 take it out and flip it around. i would do that test before i spent the time on a comp test, because if thats the problem the comp test will show normal, and the motor still wont run.