First time engine build won't fire

Well guys I know this is super old. I’ve been in and out of town for work a lot. Finally got some down time and went back into the motor. Figured out the problem, I concluded I’m a big dummy and had put the timing chain on the wrong mark. Once I sorted that out it fired no problem. I have since been working gremlins out, after I did the break in it’s decided to leak under load when driving. I am not 100% yet but I think it’s coming from the rear of the intake as it’s not leaving a puddle under the car and it only does it under load it’s pooling at the top of the block and drips right onto the headers making it a very embarrassing drive lol. I appreciate the help and feedback. I’ll post a picture of progress once I get this leak, wheels and tires figured out and give it a bath.