my 90 dually swap

[90 dually]

Just about ready to fire up 6.2 swap in my 90 dually it originally had 454 gas, using wire that fed HEI coil to feed inj. pump and cold start advance and high idle solenoid running power thru temp sender on rear of right head, but which one i have one on the side behind injector and one on top of head at rear of intake or does it make any difference? i'll post some pics if i every figure out how,lol

[More Power]

One of the switches is a simple thermal switch that switches when the engine reaches about 95 degrees F. The other sender is variable resistor with a positive temperature coefficient (changes resistance with engine temp).

The HPCA/High Idle solenoid (Housing Pressure Cold Advance) uses the former and the engine temperature gauge uses the latter.