Just wondering with stock injectors too swap very soon.

 

I don't understand the question.

Please clear it up a bit. What are you swapping in, what parts, mods, etc...

 

go to my webpage. click the blue banner. i own a 1986 TA

 

I am swapping in a 270-280 350 asnd use the stock 86 tpi iroc injection I was wondering if it could support it

I also plan on using a stock 88-89 350 tpi prom good idea??

 

yes it will support it except for the injectors. it will run lean. put an adjustable fuel pressure regulator on it. set it for 52 psi with vacuum line off.

 

Depends on what intake setup was used to get that 270-280 hp number. If it was a higher flowing carb setup, as is usually the case, then you can expect to loose hp with the tpi, especially up high. Stock 19# injectors should be ok with that power level, like said you'll need an AFPR, and maybe chip tuning to get it to work perfectly.
I ran a stock tpi with stock 19# injectors, and a Performance Resource chip for a 305 on a 357 with about the power you are looking at, and had no problems at all.