Honda advice? Engine swap?

I have a 1990 DX hatch civic, I'm looking for a 300-400hp build so I'm thinking B series beefed up but looking for opinions what motor should i put in?

Both headlights stopped working at the same time?

I have a 97' Honda Civic. Driving down the highway both low beam headlights went out. The following day both high beams went out at the same time. All other lights work fine. Fuses are fine and the bulbs are relatively new so I don't think they burned out. I was having alternator problems at the time so I replaced it but still no lights. Does anyone have experience with this sort of thing?

Car turns over but won't start unless car is still semi warmed up from previous start?

I have a 96 Honda civic ex, today I spent 5 minutes trying to start the car, the engine was turning over, it wasn't turning over slowly. The starter is testing fine first off. Car starts fine if it's still warmed up from previous start, pumping the gas doesn't help. Today, for the first time it got to the point where I had to push start(pop the clutch) to start the car, and had to do it a second time today. So it does start by push starting. Where should I start? It's a d series engine. Dy16 or something like that