I decided to put the double cam into retirement and will pursue the pushrod road. The first design is instantly better than the double cam setup. (which i was trying to perfect for the past 2 weeks, without any significant improovement). I have to experiment with the opening times, but it's definetly going to be a winner.

Update:
I ran the engine again, and it made 1660 rpms effortlessly. The key? I provided timing gears on the back too, thus preventing torsion in the crank and cam to affect performance. It proved to be a huge success. Now i only have to make the switches to align properly...