On any low comp engine the first thing I do is offset grind the crank.060 thou, this not only increases cubic in, but increases comp ratio by 1 point, as u dont usually get the full .060 thou, more like .050 to .055.. This is a cheap+easy trick to some hp+torque. your stroke increases .055x2=.110 + 3.75=3.86 adding 13 cubes. They will index the crank perfectly when they grind it making the stroke the same on all cylinders. And no worries the piston will still be down approx .090-.100. thou in the bore. you will need .060 thou bearings. Any crank grinder can do this with no problems. They used to say that this weakened the crank, but in reality it slows down the bearing speed so there is not as much stress on the crank.I have used this trick more than 20 times with forged or cast cranks, without any problems, even on brand x stuff. I learned this trick from an old stock car racer as they were always looking for something to give them an edge, and be hard to catch while being teched. Get a comp cam, otherwise it will not make the #S with a inferior brand. u get what u pay for with cams. This build is in a 3100 lb duster=12.8@105.
