heeeeellpp

as much as i like my truck being a fireworks display (dad's missing some eyebrows and there are scorch marks on the garage roof), i would like it to run.

here's the story...

swapped in new lifters and pushrods over the weekend. i had an offenhauser dual port intake and holley 750 that just happened to be lying around *grin* and decided to slap those on too.

all looked well. engine had bright shiny chrome/aluminum intake and carb just begging to get muddy and looked ready to start. primed with both oil and coolant

so i go to start her, let the fuel pump for about 15-20 seconds and she fires right up. unfortunately, i get this huge backfire and the engine dies.

so i can start her up, but she dies real quick after that, like there's no fuel or air flow. i need to break in these lifters the proper way, as opposed to having them turn into metal shavings in my oil pan.

help? what's wrong with her? should i swap on the old intake and carb and see if i can get it to run like that?

thanks

did u pull the dist. to do the job? sounds like its off a tooth.

I would double check your timing, put the old carb back on, and check for any hoses/lines that are not hooked up. While you have the new carb off, replace the power valve. The newer ones have "power valve blowout protection," however I have no idea how to tell if a carb is set up that way. You can kinda check the timing before you start the motor, you can crank the motor while using the timing light. As long as the motor doesnt fire off, you can get it within a few degrees. I am not sure how to keep the motor from starting without disabling the elec system, unless you did what I did last time I put on a carb.... forget to hook up the PCV hose to the back of the carb. OOPS!

its a timing thing.
Also, unless you've got 500HORS in the engine a 750CFM carb is way big. If its a Holley get a fuel regulator to keep it at 5lbs for the street and turn it down to 1 or 2 for the trail.