The SH 28 won't fit in the python, it's a .28 big block engine. You need to get a traxxas .15 header, and traxxas clutch spring 4146xx or 4146, throw out the shoes, also a team associated tuned rpm pipe.

Team associated tuned RPM exhaust: [link=http://www.allaboutfunhobbies.com/volcanosvparts6.htm]Tuned Pipe[/link]

Traxxas .15 Header: [link=http://www.allaboutfunhobbies.com/1_10truckhopups.htm]Header[/link]

Traxxas Clutch Springs: [link=http://www.allaboutfunhobbies.com/1_10truckhopups.htm]Spring[/link]