For the cost of the parts - why not get a vortec 4200 out of a Saab 9-7? The 2008 engines were 291 HP STOCK. Build a header and do some exhaust port work and you will have a 325HP engine.

Or add a turbo and get 400+ HP easy...

Last edited by efi-diy; 10/25/14 10:17 PM.
51 GMC 4.2 turbo
Can't solved today's problems using the same technology/thinking that created them