The 3756519 block casting was used from '58-'62 and is a 283 cu.in. engine. The date code, if I'm reading it correctly from the first photo ends in a zero, which would date the casting to 1960. Looks like B 1 0, which decodes to February 1st, 1960.
The spread-bore 4bbl intake manifold and valve covers appear to be from a later engine or engines. Heads may be mid-60's based on the casting style and end-marking.
Chevy introduced the spread-bore Quadrajet on the 396 in '65, and also used that on small blocks starting with the 327. I don't believe the spread-bore manifold/carb combination was ever used on 283s from the factory, but not positive on that - possibly in '66 when there was a 4bbl 283.
The heads are "power pack" high compression items used on 265 and 283 engines- - - -with 58 CC combustion chamber volume and relatively small intake and exhaust valves. They provide plenty of compression pressure, but the gas flow is somewhat restricted due to the small valves. The intake will be from a mid to late 1960's 327, or more likely a 350 with an early version of the Quadrajet carbutretor. Later models did not have the slot for exhaust gas from the heat riser, or the oil filler tube at the front near the thermostat housing. If you wanted to upgrade the heads and intake to later production items, there are 58CC heads with bigger valves from a late 1970's or early 80's 305, and an aluminim Q Jet manifold that would be a bolt-on swap to the ones currently on the engine. 283's use a "small rod journal" crankshaft with a 2.00 inch diameter rod bearing and smaller diameter main bearings than later model 327 and 350 engines. The small bearings and slower slip speed between the crankshaft and the bearings make them capable of pretty reliable operation up to around 8K RPM with the right bearings, lightweignt valves, and strong valve springs. A well tuned 283 at high speed sounds like a bunblebee on steroids! Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
drdoug That 519 block is what they used in injected Corvettes,the neighbors gave me one of those and it had a 3735236 crankshaft with a drilled snout to hold the harmonic balancer on. Is yours that way ??
Not sure. I am wondering why they moved the motor mounts back some with an added weld on. Either the transmission shifter to be in the right place or not to shorten the drive shaft.
~ BD. "You won't find me in an old folks home" Pioneer Florida Cracker 1958 Apache Stepside 1958 Apache 1/2 ton Panel 1959 Apache 1/2 ton Panel
That truck originally had a 6 cylinder engine, and instead of buying the correct brackets for the "bird leg" V8 mounts that either bolt or rivet onto the front crossmember, somebody cobbled up some home made brackets. They also swapped bellhousings for one that will bolt to a V8 engine and altered the throttle linkage. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
You can also see where they beat the back of the firewall to fit the distributor. You are right ..6 bolt wheel = 1/2 ton with a 235. Thanks so much Jerry!!!!
~ BD. "You won't find me in an old folks home" Pioneer Florida Cracker 1958 Apache Stepside 1958 Apache 1/2 ton Panel 1959 Apache 1/2 ton Panel
