Looking at that chart that pump should be fine, good for 550 hp @ 32 psi. I did not realize you had already upgraded the pump.

You want a cast iron head small block around 12:1 under and near peak tq and about 12.6:1 at peak hp. Those heads usually like a pretty quick advance curve and about 30-34 total advance at WOT. ...

Keep the same injectors, get a fuel pump for a 1993-1995 Astro/Safari van with a 4.3 "W" vin code CPI engine and get your hands on one of the 28-32 psi marine TBI regulators. That will boost your 61...

My experience and wideband both disagree with your HP potential of the TBI injectors.

350 with TBI heads, stock TBI cam, 1.6 roller rockers, Edelbrock 3704 intake manifold bored to 2", 454 TBI...

A pair of 61 lb/hr TBI injectors are good for 205-210 hp @ 85% duty cycle at the stock 13 psi and if they were static, meaning on all the time, good for about 250 hp at most. Most engines run...