[MidOHasp]

I am running a 408W stroker and had mounted the alternator way up high with a March bracket. This required switching the output of the surge tank to driver side and running hose along the front frame rail back over to passenger side, up around and back down into top of radiator. We totally redid this old FE surge tank for our windsor and literally blew it off the top of the stat housing 10 times (not enough metal for the hose to clamp to) before eliminating it completely. In the mean-time, we are running a straight in-line fill tube until we get a new surge tank or have this one redone (the right way). Now we can keep the system together but we see these drastic temp spikes.

We'll be running at 170F (75C on gauge) or even cooler for 20 minutes, breathe on the throttle A LITTLE and it will spike (as fast as the gauge can move) to 260F (130C). Scary. Running it over and over (keeping foot out of it) and topping off coolant, now we're running pretty steady between 170 and 200. Must have gotten some air out of the system. But if you put your foot in it, that gauge just starts climbing again, slower now. Don't have the balls yet to see how far the gauge will go now. Would rather play it safe and make some improvements first.

Switching to a regular drive pulley as soon as it comes in the mail (next couple days), hoping that will fix, but seems like there's a lot of ground to make up considering how hot we get.

This is a dyno tested 508hp (flywheel) smallblock, and I know it will run warmer than bone stock, but I know there are others out there making even more power than this that aren't overheating.

Suggestions?