I just put a 406 in my 85 Trans Am, and I need to replace the injectors. I don't know what the best size would be or the best brand. Some say 26#, and others say 36#. Some say Holley and MSD are the best. I also switched out the 700R with a T-56. I also don't know where to send the computer to get reprogrammed.

 

What HP is your 406? This plus what are you looking for (out-of-hole) or WFO will determine the injector size. Factory 22# injectors with 50#'s of fuel pressure supposedly are good up to 400 HP. As to what type, anything but GM. The ford/bosch are about the best for the money. It's according to how deep your pockets are for the cost of some of the ones out there.

------------------
1972 Corvette LT1
Keith Black 9.7:1 Pistons
Comp Cams 480/480 lift @220 Duration
Original 4 Bolt Steel Crank
1.5 Roller Tip Rockers
336 Posi Rear Chunk
1991 Speed Density TPI setup
DUI Special order Tachdrive Distributor

 

The horsepower on the 406 is about 450. I use the car as a daily driver/weekend racer. I don't wind out the motor past 6000 RPMs.

 

My vett had 489 rwhp. I had the stock 22lb injectors untill i changed the cam and heads. I knew i needed larger injectors because my fuel psi was at 52lbs after the cam/head change and after the test run....my headders were glowing RED! I purchased a set of ford svo 24 or 30lb injectors...i cant remember which ones...sorry, I think it was the 30's. Anyway, the svo's are good injectors that work on the chevy's and are ony 200 bucks new! I would ask vader or gudio on what size you need. Now that i think of it, i did have the 30's on my vett. i put the 24's on my Z

 

The SVO 24# injectors would be PERFECT for your setup!! Since they are Ford injectors they are rated 24# at a LOWER fuel pressure! So with GM fuel pressure (45+) they will actually run like 26# injectors!!