20 Valve engine is rising in attractiveness as the choice of engine in rear wheel push conversions in cars like the AE86. However it does have some added challenges included about a 16V in converting it to run within a north-south way. We have been beginning to make some improvements https://juliuspqqpm.actoblog.com/31960681/5-simple-techniques-for-4age-20v-turbo-engine-for-sale