I am not sure of what engine I have in my truck.I have a 1973 F100 I was told it was a 360 but when I ran the vin number it said that that truck came out with a 390.I have checked the spots for the casting number under the oil filer and I belive it had the number 105 does anyone know what this is also the heads have the number C8AE-H on them I need help here too.

 

Look behind the alternator on the side of the block for the block casting number. That should narrow it down to mabye two or three choices. Then, measure the stroke by pulling a spark plug and inserting a wooden dowel into the cylinder. With a breaker bar on the big balancer nut, spin the engine over so the piston is at the bottom of it's stroke. Mark your dowel at a spot that's constant, like the bottom of the valve cover. Then rotate the engine until the piston is at the top of it's stroke, mark your dowel, and measure the distance between the two marks. A 352/360 has a stroke of 3.5", a 390 has a stroke of 3.78, and a 410/428 has a stroke of 3.98".
Jason Kendrick
1970 F100 Custom 390/C6
1978 F150 Ranger Lariat Supercab 460/C6

 

Sorry I havent replied in a while been buisey I checked the block casting number it had D8TE on it I havent measured the stroke yet but will as soon as I get the chance by the codes what would it appear to be

 

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I don't think the D8TE fits with the head casting code you gave. Could that casting code be "D3TE"
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it could be a D3TE instead of D8TE it looked and awful like a 8 but I was'nt sure to begin with what does it code out to be and what were the heads

 

Sounds like you have a heavy duty or FT block with some of the most common FE heads made. They put these heads on 360s, 390s and 428s. The only two ways to tell exactly what you have is to measure the stroke or pull the oil pan and interpret the casting number.