Good on you for sorting it out. Give it one more oil change after about a thousand K or even a thousand miles to help ensure that the dislodged sludge that you didn't get before, doesn't fill up the filter. Use the colour of the oil on the dipstick as a guide.

When it comes to induction, it's obvious that a low level setup will work best. This would include twin SU types, which can mean factory A14GX induction if you can find one. Other choices include single or twin Webbers/ DelOrtos/ Solexs. The single carb setup will be lower in cost, easier to tune & will provide overall better driveability if your coupe is strictly street.

Talk to a REPUTABLE cam grinder once you have decided on all of the other engine parts. They have a vested interest in making the right recomendations & they know you will tell all your mates, particularly if it's a bad choice.

My thoughts for a street engine would include Twin SU types, or single Webber [etc] plus tri Y [4-2-1] extractors & & a moderate cam. This is a mild setup, but will return good street performance without being unreliable or undriveable. Your wallet will still be your friend at the service station too.

P.S. See if you can use a 1200 /A12 flywheel as these are lighter than the A14/15 ones