I got the # 18436572 off of the engine of a 66 delta 88 with the letter "H" as well. Is there a way I can find out about this engine with the info I have above or can someone tell me about it like is it a 455 or 425 ect?
Thanks

 

thats your firering order block number should be be side the oil fill tube

 

In 1966 the Deltas had the 425 with the 2bbl carb.

 

As noted above, 1-8-4-3-6-5-7-2 is the firing order. The "H" refers to the intake manifold. Is this intake a 2bbl or 4bbl? EGR or no? The block casting number is located on the small "shelf" just above the water pump.

 

The 425 casting nubers are found here in this picture, where Joe P. said they are. The 66 should be 386525 the 66-67 number 389244 is below in pic.

 

The standard engine in a 66 Delta was a 2bbl 425 High Compression. The HC engine had a orange/red air cleaner. A low compression version was availaible at no extra charge. The LC engine came with a black air cleaner housing. Two 4bbl 425's were available in the Delta. The single exhausted 4bbl that was the engine standard in the 98's for 1966 and the dual exhausted Starfire engine rated at 375HP.

 

All of which assumes the car still has the original engine. The "H" code intake could be a 73-76 2bbl EGR intake also. That's why I asked the question about EGR.

 

thank you guys
This is some damn good information
I still have not bought the car as of yet
Im going to go by and take some pictures of it and post them.

 

I have 2 different engines for that number

389244D {1966-1967 425 w/45* lifter angle, lifter bore 0.842 & cyl bore 4.125}

389244D w/drill spot { 1966 425 w/39* lifter angle, lifter bore 0.921 & cyl bore 4.125}

I really don't know what "drill Spot" means

 

The drill spot is a dimple where a drill bit was touched to the surface. There was only one casting. The differences were in the machining of the rough casting.