Ive watched many vids on youtube of these. Noticed how having the iron block you get a deeper stronger sound from the motor. Im sure im not crazy that the combustion compared from an aluminum block vs iron block will create a different sound. No matter if its stock swap or fully built just want to hear what you can show off.
Example: http://www.youtube.com/watch?v=wdgaJU1ly2I http://www.youtube.com/watch?v=EkALzMnojb4