How's your motor comming? With your roller, have you determined just how much longer they need to be? Trick Flow says +.450 for my solid flat cam, but I'm not going to rely on that number. Maybe as a starting point with my length checker; I've changed too many paramaters to just order a set without doing a full-blown geometry mock-up first.

I had a delay on my 331 because they had to order some metric rings for my forged pistons. The rings are in and the assy is getting clearanced and balanced as we speak.

The guy I bought my used TFS heads from included a set Trick flow 7.350 (.080 wall) pushrods that he used on a solid tappet cam. The heads were used for about 5000 miles and the guides still checked out great! I'm gonna do a mock check on the heads to see if I can use them with the roller lifters.

Spend as much time and money as needed to get the valvetrain right. It will payoff BIGTIME in the long run.

Depending on, well, a whole bunch...

let me know how those pushrods mock up with your roller. I don't think they'll work (too long) and if I haven't already aquired a set, I'd be happy to take those off your hands

The roller on the rocker arm should be centered side to side. If it's off too far, the guide plate may need to be cut in half to center each rocker on the valve tips. Often, one can get by with elongating their mounting holes to allow the plate to slide side to side. At times, flipping the guide plate over even helps.

As for back and forth motion... The roller should be centered on the valve tip, and should have no more than 0.080" sweep as the cam goes through it's lift cycle. hydraulic lifters don't work well for this due to their compressability w/o oil pressure
To do this test, a solid lifter will need to be acquired (or fabricated). you can take the guts out of an old hydraulic lifter and fill it solid with epoxy or something
As an alternative... One of those soft 'checking springs' can be substituted for the regular valve spring, and will often keep a hydraulic lifter's plunger from depressing too much during this checking process.

Vary pushrod length until the roller is centered, and sweep is under control. If pushrod length can't get the geometry where it needs to be, you'll have to try different rocker arms. they vary from brand to brand The earliest Trick Flow TW heads were designed around a CHEVY rocker arm, which is a little shorter from the fulcrum to the tip. Some manufactures will recommend certain brands of rockers.

To give you an idea how much 0.080" is, 1/16" of an inch is 0.062". The top of the valve stem can be colored with a marker, and the movement can be recorded by where the marker ink gets rubbed out.

Good Luck!

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Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220