Re: Crazy Backfiring
its very easy to check and see if the push rods are the right size.just tighten the rocker just anuf so theres no lash,you want the roller tip to be centered on the valve stem.to adjust the rockers just put the pushrod in the tips of ur finger and roll the pushrod while u tighten the rocker as soon as u feel the push rod start to get just a little had to roll with the tips of ur fingers stop and turn 1/4-1/2.if u do that and it still does that its something else.make sure u are using the right firing order because there is 2.ps thoes heads way big for a 302
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347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters
^best et so far 11.6 1.61 60ft coming soon 9sec et's 
1992 mustang gt
2001 gmc 1500 4x4
78 century boat
92 skidoo
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