How do modern cars regulate temperature so well?

All true, but if someone is gonna pay $400 more for the new model 4 with SEFI instead of the model 3 that doesn't have it, expecting it to be better 'performance' wise...well there you go. Matter of fact the Pro-flow 4 for example may have SEFI, VVT actuator, boost control, trans CAN BUS, line lock, coffee maker, data logging, hand warmer.....but all that stuff isnt even present on a 340 in a 68 Dart. Just pointing out the features on a Pro-flow 2 may be all the person needs. I wouldn't recommend the Pro-flow 1 as it as not user programmable past +- 10% variance, unless you want to build a turn key stock internals 360 with only a Performer RPM camshaft and headers All other variables past this base tune need to be burned by Edelbrock and I'm not sure they even do that anymore. But it does come with a great intake, 28lb injectors and plumbed fuel rails. Great for a flexible MS2/3 conversion.