Well fire up the 427 last night and rand awsome

I am happy of the engine sound and oil presure
and running temp..

i rand it up to 2000 for 15min and oil was 80 psi
w that by pass eliminator and at 180F the psi drop to 60 the block got to 200F

I drop the Idel to 1000 and turn the key off but the engine never stop the alt kept supplying the
Crane Box I ges? but I just turn the Idel screw to 600 and it stop

I dump the oil and flter. replace the Oil by Lucas and a K&N oil filter

fire it up rand good Idel at 800 turn key to OFF
all stop .. Now turn key on the block fired right up no problem Idel up to a 1000 turn key off NADA kept running Put the key to ON and lower the Idel to 600 turn OFF it all stop

How can i remedy this I have a heavy duty selenoide 100% duty cycle and The power from the
HEI distributor Wire The red is what i have the coil hook up to ? any Comment