need injector help

Ok to start i have a 383 stroker.all forged,with an lt4 top end and a dual 58mm tpis throttle body.What size fuel injectors would be the best fit for this car?

Wrong forum.... this topic is routinely covered on the "Fuel and Ignition" forum.

Injector size it determined by flywheel HP. A simple guideline - for minimum injector size on a normally aspirated application, multiply your estimated max flywheel HP by 0.07

Example:

500 flywheel HP x 0.07 = 35 #/HR

That assumes a BSFC of 0.476 and a max injector DC of 85%. A better, more efficient tune will reduce the BSFC, requiring less injector. A lower duty cycle is always a good, idea, and that would require a larger injector.