I built my stroker almost 20 years ago. It has always passed emissions cleaner than a new vehicle. The key is in how it is set up. I run 10.4 static compression and cut the quench height to .045". It has an aggressive RV cam and has a bored throttle body and headers and a 2.5" exhaust.
I have over 200k miles on it now. I just pulled my teardrop off road trailer on a weekend in the mountains of Colorado and over 6 mountain passes and camped at 12,000 feet elevation. I averaged 16 mpg over the whole trip.
The key is tuning. I run an AFR and have adjusted the fuel mixture to optimum using different injectors and a MAP adjuster. I get 20 mpg on the highway. If I had to do it over again, instead of this I would probably use an adjustable fuel pressure regulator.
I highly recommend an AFR on a stroker. I have seen too many self destruct because the fuel air ratio gets out of whack and burns up the motor.
