I have an extra engine sitting in my garage that I might rebuild this summer....I was thinking about polishing and porting myself. is there any step by step instructions on how to do this? I cant seem to find any templates on porting a 13B 6 port.



For whomever has done the TB mod, how much HP can you get out of it?

 

there aren't any six port templates. this is a pic of a 6 port streetported that judge ito did

 

Well I found templates for 6-port center and end housings HERE YOU GO

 

I did the TB mod, don't know how much of a hp gain there was, but there was a little bit of a gain in top end. Not any thing that will whip you back in your seat though.