"Tracy Crook wrote:
Probably only a couple of amps. Right Tracy?

This may be understating the requirement.  You need:
4 - 7 amps for EFI pump
4 - 6 amps for ignition ignitors
5 - 7 amps for injectors
1/4 amp for EFI controller (EC2 type)
13 - 20 amps total depending on exact parts & RPM of engine.

I use a 22 AH motorcycle battery.  That would last a little over 1 hour.  I
test it for capacity at 6 months old & replace it at 1 year.
Tracy"

This dates from 08/29/1999
Looks like the injectors are of the peak and hold type.
Don't know what type of pump for sure but I think
he was using Walbro's in those days.
The ignition sounds like inductive.

Paul Lamar