My 2019 Automotive goal is to finish my figure eight race car/derby car and get on track once again this year. Part of the build is assembling a new engine; I’m thinking mild build, torque more important than horsepower as all our tracks are small so 0-40mph is about the range I need.
For the engine I’m thinking a Small Block Chevy (SBC) build to make power from idle(1000 rpm) to around 5-5500 max. Running a 3.73 rear gear with a TH-350 or 400 transmission.
So onto the question, I’ve been looking at different options for cylinder heads. With my preferred power band, what experiences good and bad have you had with aftermarket heads versus stock/original?
I’ve been looking at heads featuring 170-180cc runners, so what would be recommended?
-Stock 86 and older
-96-98 Vortec series
-Dart Iron Eagle
-World S/R Torquer
-AFR “Street” series
Keep in mind, figure eight is full-contact racing, so radiator failures can mean running high temps for extended period as well.