Well ported CJs for a 385 series approach 400cfm, but I'm wondering if there's a factory intake that wouldn't hinder the combo, seems the factory SCJ deal would be way too small to feed it. 

As stated, I'd be building a '66 Fairlane R code.  Best true production heads, best production intake, big bore, big valves, stronger block. 

I don’t have info as to how Brent flowed the heads, but even doing everything correctly there’s a fairly wide margin in figures based on using a pipe, and what size is used.  TFS flowed it with a 2” which is fairly large for an FE

If you haven’t seen it, this guy does a great job showing results.  He’s fairly new to YouTube but is a fairly well known head porter and gives good info, flow info stArts around 28:00

https://youtu.be/DNfA7XD7xYM

I have BBMs on my mild 390 with a little 224* roller, and I have a set of TFS sitting here as well....maybe a back to back is in order

I guess I don't see where the debate is, TFS flows more through a smaller port for $600 less.  I don't know enough to know if somehow wet flow is horrible on the TFS, or if they stall early (every indication is they're fine for most hydraulic roller combos that aren't 500ci+), but doesn't seem like it's an issue as they seem to dyno in line with expectations. 

Any BBM/Edelbrock that can run with them is being ported which brings the port energy into question as they're already larger.  As stated, I'm sure there are applications where the air speed gets too high with the TFS and a larger port would work better, does anyone know how much the TFS can be opened?  My understanding is TFS is usually pretty good about leaving meat in the ports.  I know it's sort of unchartered territory to go grinding on CNC'd heads, but small block guys do it all the time.

Did you touch anything else at all?  I'd start simple with something I see all the time, is the accel pump arm(s) adjusted correctly? 

Maybe in a 650ci engine 

I’d think more in the 7-8” range

Some kids came through and did that recently, I never lock my '96 GMC because the truck is worth maybe $500, but still runs/drives great.  Anyway, kids were idiots as they just took change but left a pair of RayBans in the visor, and some pretty decent micrometers that were sitting on the seat.  I know, dumb by me, but I'd never had an issue and got careless. 

Now this was rolled out last year, but you have to wonder if Taglich already had influence, but AFR already introduced a line of import castings.  Just hate to continue seeing it across the industry, as a "niche" market it's one of the last to see the manufacturing head offshore, but it's becoming more commonplace as profits are chased.  I imagine this "offshoring" debate is beating a dead horse, been discussed many times already here.   Main issue is I hate to see a top level supplier like AFR lose its way.  If you follow what they did with the 385 series head, following the excellent SBF heads that have been around for years, I was sort of hoping they'd somehow step into the FE ranks at some time.  Doubtful now.