theres a guy on one of the RX-7 boards who has a sick built motor, something like 60 thousand dollars.. Hot rod magazine featured him as the most prepared motor for street use ever... he was using formula 1 technology..

but apparently when you get all the piping and turbos and stuff outta there.. the LS1 still keeps very close to the same weight...

WIsh i had the board URL but the thread on this car is like 50 pages long... and several years old, they all worship this "JIMLAB" guy and hes really good at what hes doing