OK, its been hijacked sorry.
The engine was a 406 with 2 bolt block 4.155 bore, stock cast crank,5.7 305 rods, trw 12.5 pistons, bowtie heads 205and1.6 valves fully ported, (junk porting) 630-630 roller setup, eldbrock tunnel ram with two 660s and 5000 stall w/gluide. Rear end 12bolt w/5.13. The only thing i did to it was intake and carbs oh ya nitrous only used a few times with this engine.
I didnt shift at 8300 but 7000, 8300 is what it went thru the traps at