1980 c10 383 help

[SLDPULR]

So I'm taking a break on my 69 short wide body off resto to play with the 1980 c10 short wide I picked up a month ago. The truck is in amazing condition but has the anemic 305. I have the 460hp 383 I built for my 69 sitting on the engine stand and plan on swapping it into my new 1980.

First question is will all of the accessorie drives from the 305 bolt up to the 350 block? The truck has factory ac and I don't won't to loose it.

Second question is are the engine mount locations in the same spot? I have the red prothane mounts that I was going to use in my 69 and I was hoping that they would work.

Third question is can someone confirm my gear ratio. From the research I have done I'm thinking 273 gears. I have the original window sticker and it just says standard ratio. (12 bolt)

Last question is could someone chime in with torque converter stall speed recommendations. It's a single cab short bed, 460hp 383 with rpm air gap and 750 Holley dp. The truck is a auto th350. I would like to keep the 273 gears if possible just for highway cruising. All the research I did only pulls up converter stall speeds for camaros with 273s

Thank you

Pics of the truck for fun





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