Hi Folks I am having trouble with engine performance on a 383 stroker. Unfortunately I have no idea on the engine spec sheet. It is a couple of year old build with a few thousand miles on it. It has a 650cfm Brawler carb. No idea on the jetting but I assume it is all stock. It was idling fine but had bad low end power. I read several threads and got some feedback people suggesting to advance the timing. Also I had very low vacuum (~ 6Hg). I advanced the timing as much as I can, the distributor pretty much will not go any further counter clockwise. I checked the timing and it shows 28 degrees at idle (idling around 800rpm). The car starts fine and idles fine. In fact it was idling a bit high at first even with the idle screw all the way out so I pulled the A/F screws out to about 2 1/2 turn and idle came down from ~900 to 800. All these are with car warm and in gear. I think this is still a bit high. I took of the vacuum line and plugged it. Then reve'd the engine to ~ 3000rpm and I see 42-43 degrees. The engine seems to take this high an advance and runs fine. Performance is better then where I started. It is running quite rich however. That is probably a good thing with so much advance. Here are some questions: 1- The engine seems to run hot. If I let it idle it settles around 200 degrees but if I drive around a bit, it creeps up to ~ 230 and it cannot seem to cool down. I have recently installed dual electric fans which kick in around 190 degrees. Is it running hot due to the high advance? 2- Why is the car idling high with the idle screw all the way out? I did not check the vacuum but I believe it improved quite a bit with so much advance. Some of you may have seen my other thread where I had trouble with HVAC vacuum lines. After finding the thorn line under the dash and this advance update, the hvac controls are working fine. 3- I had a flex fan earlier with a factory shroud. The original Air guys suggested I get rid off the flex fan as it would not work well with the A/C thus I added the dual fans. When I did this I put the fans on the radiator and left the shroud as is. I am not sure if the pull fans are affected by the shroud behind them negatively. I doubt it but I have not seen any examples of people leaving the shroud and putting electric fans (I have seen electric fans that have their own shroud, I am talking about leaving the factory shroud as is). It is possible that air gets trapped between the fans and the shroud and working against me. Any ideas? BTW again idling in the garage the car is not overheating. Thanks for any suggestions in advance.