I have also read a lot of bad reviews of aftermarket aluminum heads and don't want to have to drill holes or alter heads. I like torque.
If you can find Aluminum heads for TBI, you'll have no problems with it but, they're few and far between anymore. You can get a spread bore intake for TBI and use an adapter plate for your Throttle Body.
I just put an expensive exhaust system on the truck and if I go to headers I need to pretty much toss it
You need to decide how much money you wanna spend. A 383 with restrictive intake and exhaust is counter intuitive.
are there any out there who could see upsides to leaving swirlport heads and stock exhaust in conjunction with 383 stroker, Comp c"ams hydraulic roller 08-500-8 cam, 480in. intake and .488 exhaust .o40 over pistons, stock tbi,?
Cost but, not much else
I'm not a fan of those 193 junk heads but that's my opinion. I'm lazy and don't see any sense in working on junk just to get better junk. Your running a fairly mild cam. I'm running, on my Blue Print"383", the 08-432-8 cam with the Edelbrock 3704 TBI intake, a bored 46mm TB running at 20 PSI and stock 5.7L 61PPH (flow matched) injectors up to around 5800 RPM against the rev limiter. With shorty headers, to a 3" Y pipe, high flow Cat, and straight through muffler I'm getting plenty of flow. Note, the Shorty headers bolt right up in place of the stock cast iron manifolds. And believe me, shorties DO HELP as long as the rest of your system is free flowing, not as much as LTs but do help.
Anyway, yes you s/b able to run your stock TB as is up to ~5000 RPM (well maybe 4500), not much more, just jack up the pressure a little.
I plan on getting a new prom card or chip, or whatever it is. I have to think that with these components a lot of my running issues were caused by this.
That could be, have you thought about getting the EBL Flash-II? You can tune it on your own, especially with a WBO2.
It's a joy to get out, hit the skinny pedal, and romp around. My problem is, I can't give it more than 1/2 throttle without smoking the right side tire with .411:1 gears and 275/60R15s - no posi!
Maybe sometime soon...YMMV