but can i use the valve springs and rocker arms on the gt40/gt40p heads?
also do i need new pushrods they look straight still?
and is there any other things need changing?
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1993 5.0 Mustang, 93 cobra intake , GT40p heads, Trick flow valve-springs upgrade, 65mm throttle body,73mm c&l maf, 24# ford racing injectors, cold air intake, ford racing hardened push rods, ford racing headers, flow masters, cat-back x pipe,Hurst Short Shifter, MSD coil and 6AL, saleen racecraft springs, roll cage, GS-1 racing seats, Simpson 5 point seat belt harness, FRPP hood pins, new water pump, ARP and felpros all around. And a ton of WD-40 lol
stock springs wont handle ANY type of aftermarket cam,so you need to upgrade or else you'll get valve float
the stock rockers will work,if you really want to use them,but upgrading to roller rockers is a better choice
when changing heads/cam,every combo is different,so to get the proper valve train geometry,you need to convert an old lifter to a solid lifter,get an adjustable pushrod length checker and properly measure the pushrod length need for that particular setup
you may get away with stock length,replacing the stocker with hardened pushrods is advisable,but you wont know till you check
improper valve train geometry can result in noisy valvetrain,loss of power and the car just running like crap in general
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92 lx 5.0 vert-,stock plastic airbox,stock T-5,shifter & clutch,stock 19lb injectors and fuel pump,no radio,speakers or cruise control..antenna delete(for less wind resistance)
(new)best so far 12.712 @ 105.99mph 1.752 60ft
trick flow sells a upgraded spring kit for the iron ford heads. is there any reason you are set on a tfs cam? have you looked into comp and others?
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1990 GT 5.0 T5 3.73 4 wheel disc brakes, ported gt40 heads w/ tfs spring kit, tfs street intake E-CAM +4 advance, bbk headers,cold air and h pipe. spec-1 clutch w/ promotion adj cable and firewall adjuster.i took a 5.0 from a 96 explorer w/ 97k, i swaped the intake and cam ported the heads......WOW this thing now rocks for only a few hundred dollars to do the entire swap, well worth. i am currently chasing a idle surge issue
They should have the GT40 valvetrain kit which includes springs than can handle quite a bit (including the 1 cam), BUT... since they're used you should upgrade them due to the age of them. Don't scrimp out on the valvesprings, get new springs and you'll be better off. And change the pushrods too, get HARDENED rods and they're very affordable. Too many spend money on heads and then don't want to spend a single dollar on springs or rods, and then they have problems. Do it right the first time.
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Trick Flow Stage 1 cam with stock springs and lifters 
