Having a frustrating time trying to get the car going.Here's what i have done.Motor was dropped in.Was in running order but died out prior to pulling it for gasket replacement and cleaning and a repaint.New engine wiring harness installed.New wires,plugs,cap, rotor, coil,modulator for GM HEI setup off of a 75' firebird.New battery.New body to frame,firewall to block and battery to fender ground straps.Internal regulated alternator.I'm pretty sure i have the distributor in correctly and have altered the new engine harness (from point setup to HEI) as suggested from replies to my other post on HEI help.Holley carb has been professionally rebuilt(bowls have gas).I am getting the fuel,i have the compression but i cannot seem to find ANY spark.I have power going to the coil.I have power coming off the junction block on the rad support from the battery.Motor turns over very strong.I think i heard ONE VERY VERY faint/quick try (puff) to fire but otherwise nil,no backfires,zilch.I am running the power to the HEI directly via the IGN terminal on the fuse block using a 10ga wire.When i turn the key to start, using a test light it shows it has power coming and going from it so i THINK my ignition switch should be ok.I suspect my coil or modulator may be out to lunch but i have no clue how to test it and i do not have a good spare for a swap test.I do not own any electrical testing equipment.Should i just do the old trial and error and buy another new coil? From my description does anything seem obvious that i am missing? Thanks in advance for any replies,i really want to finish this up so i can drive it THIS summer.

David