Good morning!
There is a very experienced guy in germany (Ralph) who pushed his RAM with 428FE to low 10 second times in street setup frequently. His english is good enough to order parts, but probably not to help sort the problem.
If you have someone speaking german, it may be worth your while to call him. Let me know and I pm his number.
Or go to his website
http://www.cobracorner.de/index2.php