Dont know what the mods have been except what I can see. The weight is with a burly mechanic in the car and half tank of gas.
Specs that I know of :
Edelbrock Performer 289 intake
Edelbrock 600 4v carb
Mallory unilite electronic distributor
I would ask the machine shop that did the work but they are out of business which is why I was wondering about their work. The previous owners moved and I dont have their contact info, they did keep the last 20 years of receipts in a big box. The engine was rebuilt last spring and the receipt from the machine shop listed these items:
289 core and rot asbly
BP and Balance
Hi-Performance Cam, mch lift
Flat-Top Pistons & additional machine for valve rec.
Rebuild 1967 Hi-Po heads, 3 angle, comp springs, brass slv
Portland Performance Machine...
Looking at the work it seems they had decent intentions, I just dont know what the specs of the equipment were.
Assuming this work was done I would think the HP numbers would have been higher. The torque is pretty darn high, which contributes to the excellent seat of the pants feel.