Help on cooling

Hi,
Brand spanking new to this, but i have looked into it a bit. I'm building a hot 1835, i have it all drilled for full flow with a Fram and a thermo controlled Mensa oil cooler, thats the oil cooled but what about the heads, inc warm-up.

Question is, i'm running a scat 30hp style doghouse & i'm going to graft in the thermo flaps. can this be done or would i be better off with the stock doghouse even though it's bigger (uglier). second what exhaust can i run with the stock thermostat in place?

Need this car to warmup properley and run well as it's a driver more than a racer.

Cheers.

Paul.