Hello guys, was wondering if anyone has any combo like this and can estimate how fast it will be? I don't know how much it weighs. I just bought a 1985 GMC Sierra short box. It has a 355 with 9.5 cr flattops, world sportsmen II untouched heads, full roller 1.5 rockers, bowtie high rise dual plane intake, 625 carter carb,widage tray, crank scrapper, 1 5/8 full length headers, 268xe cam(224/230,477,480) 3 inch duals, 40 series flowmasters,3.08 posi, 2200 stall, th350. Thanks guys, know this is probably a heavy truck, but it says the curb weight is only 3450lbs!! That can't be right. It does have a fiberglass cowl hood though. Any comments appreciated!! Thanks guys.

Its gotta be around 4000+lb with driver.
I'd say you should be in the 15sec range if tuned right, needs some gear.