Indy360-1 cylinder head on LA intake manifold

sin said
いいエンジンだ

Thanks for the great info. Is this Holley?

You have to converter the written word into English.
The, “Is this a Holley” question is, No, it’s a MoPar Performance Tunnel Ram. It’s abbreviated like so;

MP- MoPar Performance
M1 - Denotes a MoPar intake.
TR - Tunnel Ram or DQ DualQuad or two 4 barrels
W2 is the MoPar Performance race iron head.
W5 is aluminum
These two above are closer to replacement style heads and will use an offset intake rocker and often a rocker stand so you have the ability to move them around.

W7, W8 and W9 are on the exotic side of the aluminum race heads from MoPar. Require very hard to get hardware and unusual parts. These heads are about a 1,000 HP naturally aspirated on the small blocks.

sin said
My concern is that matching the ports will make the manifold thinner, resulting in lack of strength and leaks.

Stop at .030 wall thickness. You’ll be Ok. If the ports do not expand out to the Indy heads ports, so t worry about it. Just try and get the middle and roof there first, side walls second, floor last. As it is of the least concern. The roof is most important followed by the sides and middle.