Filler neck

[blueoval68]

I think it was on this board where somebody was grafting a modern flapper into the filler necks on early mustangs to prevent backsplash, anybody know where I can find the info about this?? Thanks

 

[cmayna]

Here ya go:

http://www.stangfix.com/testforum2/index.php/topic,2879.msg81554.html#msg81554