I wouldnt be scared of running the TS heads one bit. yes there are some thing you need to know but just learn those few things be fore you get going and do it right from the get go. There are enough guys out there that you can ask and get some straight answers. Talk to Scott and does what he says and yout T heads will be just as dependable as any.

I think if your power goals are 1200hp and less go with the PSO's. If you want 1200+++ you will have to move up to the TS's and predators. It would suck to buy the PSO's and then want more hp and the heads are going to be your limiter.

My advise get the TS's or Pred's and get the hp to where you want and maybe the engine wont have to be set on kill and you can alway upgrade in the future with out the heads holding you back.

Thats what happened with my 496 engine with the 440-1's the heads are my limiter and i dont feel like changing everything in a perectly fine 800hp+ engine to get some more hp

I would not let headers stop me from moving up in the power department, that's for sure. but we all have our limits. IMO stepping up 150+ hp and NOT getting new headers is a big mistake. FWIW in the right hands a set of MC's flow pretty well to. Mine are right at 460 oval intake ports and all.

Looking at running Top Dragster huh? It is gonna get crazy with the ET's there real quick. We had aspirations to run T/S but gasve that up once we saw NHRA heading that way. Those cars are also gonna get out of hand in a hurry. no room for us little guys anymore. I hear the new Medium Dragster class is gonna kick butt

Most of the info here is good, but there is some that was not given. TS heads are available in various versions. 4.800, 4.840 and 4.900 bore spacings. Wedge, HEMI and "Wayne County" head bolt patters, so a casting is made for about any block you have. Lifter geometry is not bad. Better with moved lifter bores, but is not a "must do". Are no where near usable out of the box, they need extensive work, as they are basically hunks of alum with a few holes. Rocker gear is no problem, Jesel or T&D. Same as Predators, you will need a sheetmetal intake. Now all that said, if your goal is to run a little T/D, I believe I would keep what I had and invest in a nitrous system, lots cheaper way to gain a couple hundred HP.

Monte