Nothing wrong with a 347.
Smaller runners will help with better economy though.
If you are thinking turbo, those guys are making some serious torque with stock everything. Pretty much the same torque I'm making and a little less hp, but talk about a wicked street combo.
Turbos or any power adder can be more maintenance and more of a headache on a DD.
Most have agreed that a fun DD package would be a set of thumper heads, cobra intake, 65 mm t-bod, a Cobra bumpstick. Great throttle response, high 12 second possibility on a slick, yet purrs like a kitten when your stuck in traffic. 24lb injector and a 75 mm maf.
If I had to build a DD Fox, it's how I would do it.
Trick Flow offers a fine product...the key is to stick with a proven package.
If your car runs ok for now, start upgrading the upper and lower arms in the rear, get the poly bushings for the ears on the 8.8 and some new spring isolators while you are at it.
Next pre investment would be a bigger fuel pump and a nice kirban FPR. I've run Aero and Holleys and both have failed.
If you have the stock clutch, grab a king cobra and start breaking it in now; resurface the flywheel of course.
UPR makes a nice quick release quadrant over the stock platic ratcheting pawl. Get the extreme firewall adj, and QR quadrant. I think a few have complained about UPR's cable quality so you may want to source out a different adj one.
Pro 5.0 Shifter is a nice upgrade.
I would get these upgrades out of the way first before I touched the engine; again, this is my opinion after having built two Foxes.
you literally just built my car, and yes, it is fun! she runs great for what she is
308 built by me, Ross forged slugs, cobra intake, Thumpers w/ 1.94/1.6s, Anderson n-412 cam, 65mm tb, proflow 75mm maf, 3.5" power pipe, 24# inj, 255lph fp, 1.6 rr's, kirban afpr, u/d pullies, no a/c or smog, taurus fan w/ DC control, KC clutch, pro 5.0, 4.10s, hedman L/Ts, 2.5" H pipe, spintech prostreets, alum d/s, MAC c/c plates, MSD 6al w/ blaster coil, Taylor ThunderVolt wires, 3G alt, full-length sfc, UPR uca's/
lca's, tokico struts, strange 10-way shocks, maxspeed springs, HID 5000k