Which trickflow heads

[79and92]

I am in the process of building a mild 347. I will be using either the FAC 170s, high ports or the 185 cnc. I will be eventually building a more wild 363 dart block. Question is with the 363 I would send out the 170s and the high ports to be ported but with the 185s I would leave them alone. What do you guys think the best idea is thanks.

[Farmer83]

The high ports probably have the most potential as they were good enough ported for the fastest pro 5.0 racers way back. The 185's will be just about right for the 347 but when you step up to the wilder 363 they might not be enough. The 170's have no business on a 347 or larger engine Imo.

[Ourobos]

For what you have now, either would do fine. But for a wild 363, I'd go ahead and get the 205 CNC if in the budget. A set of those on my 418 made 530hp to the tires N/A. They are nasty.

Also, some ported 170s on a 336 with 12psi made 665hp, so the 170s will work, just depends on how you use them.

[79and92]

The 170s can be ported by fox lake or tea to the 205 size or even larger.