there is pretty much nothing you can do cheaply to up the power on these... in fact you actually have to detune em a little if you want em to last... they were built for way better gas than we have today so factory spec timing is a little too aggressive for today's fuel.
they are still fine engines but you can't just swap a few parts to make more power..... ALSO parts are NOT easy to come by and many parts just aren't available for em anymore.
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