I am putting back together a 454 and was planning on a aluminum airgap intake. The choice is because I have it. I also have a port expanded 92 intake which has hot water all through it. I read lots on winter problems without heat. What are your experience? In winter I could run a heater hose under the intake pull intake air by the headers. In the summer pulling a long hill with a trailer a bbc makes lots of heat. It will be using a 454 tbi on a adapter.