273 is it good engine?

273 was the Grandfather of the 318/ 340/ 360 LA Things changed a little but not much. Early engines had smaller bolts and different angle where the bolts went into the heads for the intake manifold, so heads and intake were different up through ?? year 64?

The 273 and early 318s had smaller converter snouts

Heads on bigger engines got bigger valves.

I believe all 273's had cast adjustable rockers, No other LA did except T/A engines which used different, offset rockers.

There were so few changes, that you can and I did, bolt the heads and intake off a 273 onto say, a 318 or 360 shortblock. They won't have much top end due to little valves, but they are a torque monster that way LOL

Very few changes really

"Of course" they are good engines LOLOL