2003 Mach 1 - F1.28 Fuse blows on KOEO

Hi,
So seeing if anyone has pointers on where to look.

Car is a 2003 Mach1, heavily modded. Stroker car and engine was recently pulled and refreshed.

Car will not start. Key on Engine off F1.28 (30AMP) blows immediately.

Things to consider:
1. Battery is in back of car.
2. Recently this happened and we swapped out the CCRM with a friends and replaced the 30A fuse and it ran fine (for a short time)
3. The fuse seems originally to blow when we gave it any gas.

Things I have done.
1. Checked grounds. Engine to Body via motor mount, Engine to Battery via motor mount. G03 & G04, under dash grounds.
2. Checked other fuses -- none blown.
3. Tried to run a scan, but will not run, appears car is in PATS.
4. Dash has flashing alarm and --------- across the odometer.

Any ideas on where to go next?

Well it came back alive. I regrounded all major grounds, unplugged all sensors, blew them out, repluged and its back alive

So oddly enough, 1st gear pulls hard, no issues, everytime we get to 3rd gear hard pull the fuse pops again. We have narrowed it down to unplugging injectors 5-8 and the fuel injector sensor