Do domed KYB 399’s interfere with 302 cast heads?

Im talking about the 273, and they’re a perfect comparison considering I’m using 920 heads from a 273, a cast crank from a 273 and the rods that were with it because they’re interchangeable. And I have commando pistons on the shelf next to me; where the dome is at its highest is the same as the commando pistons, I’m wondering if they are going to hit the quench pad between the valves. I’ve used 399’s no issue on stock 318 heads (I mean the 920’s were stock for 2 years so were cast cranks) thatre open chamber so 68+ and they don’t even make a ton of compression so I think they would fit. I know how far out of the hole the cylinder goes and the lowest area other than the quench pad in the head. Plugs definitely would clear I don’t question that from experience building these in all sorts of other ways and knowing was will fly. But yea might get them anyway because I have plenty of heads I can use I have some X heads that are open chamber but the valves are bigger than I’d like. Even the 302 has bigger valves than I’d like which is why I want the 920s. I know I can get more power even with the slightly smaller valves from experience

RustyRatRod said

It's one of those instances where you want to be 100% SURE. Even if UEM says it will clear, that's not enough for me. I have to measure. It's not worth the consequences if somehow someone is incorrect, OR if your combination is somehow "off the map".

There were no optional factory domed pistons for the 318. Not in this country anyway. The closest comparison would be the 273 Commando and those domes are entirely different.

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