1971 Swinger Build \6-V8 Swap

MAYBE he stroked the old 318 but chances are he thought you would never know the difference and just sold you a stock 318. If it were me I would find out what I had. Did you get anything in writing?
Yes I have transactions and receipts of certain purchases I would not let him use my Funds at the time if I didnot know what he was purchasing. So far he has told me it is had a stock crank, 270 is kydarian Cam. He is also told me he board it 30 over Purchased the performer intake and the carb at the local fling Meet. Also purchased a 360 rebuild kit, Over all it took about a year To get done. compared to when he told me it would take 2 weeks to build.When we agreed in the beginning when I was just intrested in looking at A904V8 trans that he had. Mr. James L Burt Offered me he could build the engine in 2 weeks and this is what he gave me, Informing me that the motor had turned into 364ci and crunched the numbers in front of me while we were loading it in the Van to take with me when I was coming to pick it up. Mr. Burt also gave me pictures of him in stalling crank and Cam Which are below.
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There are alot of factors that can determine the cubic inch and hp. But what I have been trying to wrap my head around is if it is a 318 crank or a balanced 360 crank that came with the motor from a previous build when those cranks were still availible from what i have read.

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UPDATE 5/2/20
After speaking with engine builder he has in for me that the motor has a stock 318 crank and is not a stroker. His words.
"I will try to dig through my mountain of paperwork in my storage and see what I can find for you. Yes it was an Isky cam and kit. It is a stock crank, turned and micro polished, not a stroker. I remember it has flat top, hypereutectic pistons, and if my memory serves me right it is right around 9.8 -10::1 compression ratio. A great combination for premium pump gas. An octane booster isn't neccessary but will add some horse power."
Day by day so far but gets closer everytime.
Wi$h me luck!