I’m wanting to upgrade my heads just need help choosing I have a 347 stroker with x303 cam scat rotating assembly air gap performer dual plain intaker and Holley 650 I have gt40p heads now with 1.60 rockers but I’m waning more flow and still keep low end torque please help thanks
I’ve got a 347 in the works and I went with the 205cc 11r trickflows. I’m sure a lot of others will agree it’s a great head. Afr heads are always good too. Either would be a great step up from gt40p. Shoot I run those on a 302 and I wish I had more head lol.
I’d look at another cam too. Although the x303 is one of the better alphabet cams for a stroker, there are much better ones out.
Definitely go with 205cc. You could do 190, but 205 is better imo.
If you want to go off the shelf, try a comp xe274hr or 282hr if you have a manual or a higher stall converter. They’re pretty popular grinds for a 347.