67 twin turbo dart

Matts440 said

Good to know, will figure out a way to tie it into the car to connect to the fuse block that goes to the battery ground directly. I'll get the firewall gromnet to connect the heads and intake to the fuse block ground

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I put a ground lug in the trunk. Ground the battery there and used 2awg to run all the way up to the block then to the heads and intake. The fuse box and ecu were already direct to battery. The coils were discharging and not getting a good enough ground and so the voltage signal was being crossed over to the crank trigger to ecu wire.