The TFS heads are for sale. They only detail that you guys might not know about is the springs.

They have PAC racing beehive springs, P/N 1518. They are the same spring as the PAC 1218, but they've been nitrided for greater longevity. The max lift they can tolerate is .650, approximately 130 lbs. closed, 337 open. The springs were installed by Lloyd Elliot, so the installed height and pressures have all been checked and verified.

http://www.pacracing.com/Street_Stri...Set_of_16.html

Here's a copy/paste of the full ad from the other site:

I have some TFS heads for sale. They've been ported by Lloyd Elliot of Elliot's Port Works. The heads took my 91 to 11.9 @ 119 MPH and a tick under 400 RWHP.

Here's what the performance shop that flowed the heads had to say about them:

Hi Josh,

They did arrive and I already have a bunch of information for you.

First off they are 100% ported. Not just a bowl cleanup like you had alluded to. Guides are narrowed and necked downed nicely and this head had been ported from one end to the other. I might add it was done by someone who looked like they knew what they were doing and had a very neat hand (the walls were straight and the overall execution was certainly above average). The porting might not have been as obvious to you because the heads were glass-beaded when they were freshened disguising some of the finish sandroll marks that are clearly evident when you look closely.

Finished intake port volume 205 cc’s

Intake Flow

.200 @ 140
.300 @ 200
.400 @ 245
.500 @ 274
.550 @ 280
.600 @ 282

Exhaust port finished volume 76 cc’s

.200 @ 108
.300 @ 144
.400 @ 176
.500 @ 190
.600 @ 204

Combustion chamber volume is very small @ 57 cc’s (just under actually like 56.8 actually)

The heads have about 600 miles on them. Before I installed them, they were flowed, decked, CC'd, and had a 3 angle valve job.

I'm removing them because I'm in the middle of a comparison between these heads and some out of the box AFR 195's. For the information on that test, see here:

http://www.corvette-guru.com/modules...d=7225&forum=1

$1200 plus shipping. They are off the car and ready to go.