There are other articles on how to build 305's up to 370 + hp,like this one;
http://www.popularhotrodding.com/en.../0667_phrs_305_chevy_engine_blocks/index.html
One thing about the article you show is that it makes it's peak hp at 7200 rpm,which sounds a bit high for a stock bottom end.But there should be lots of 305's around,and small block Chevy parts are easy to get.If it's all I had,I would be looking for higher hp levels.
Guy
http://www.popularhotrodding.com/en.../0667_phrs_305_chevy_engine_blocks/index.html
One thing about the article you show is that it makes it's peak hp at 7200 rpm,which sounds a bit high for a stock bottom end.But there should be lots of 305's around,and small block Chevy parts are easy to get.If it's all I had,I would be looking for higher hp levels.
Guy