Did the reputable shop provide an invoice with part numbers for what they used in the motor?
If so...... there’s the missing cam info.
Many many years ago I went through a pretty fresh 360, also built by a reputable builder.
It was also touted as 9:1 and “close to 400hp”.
Well, it was a serious dud...... so I was tasked with seeing if I could perk it up.
First up was a compression test....... 105-110psi on all cylinders.
It had a really long slow cam in it, which wasn’t helping matters.
I messed with the distributor and carb...... got it running as good as I could, and told him it would have to come apart if he wanted it better than that.
He drove if for another 2 summers, then brought it to the engine shop where I was working at the time.
I tore it down and discovered an unmilled block, unmilled heads, 8553 gaskets, and dished trw pistons.
It was 7.7:1cr with an Edelbrock camshaft(the bigger one, Torker plus??).
Edit: they don’t sell the Torker Plus SB Mopar cam anymore(no loss), but I was able to find the specs;
306/
[email protected]
222/
[email protected]
.447/.450 lift
112lsa
So much for the reputable shop.