You can get the 604 and 602 crate engine bolts from claytonsperf on E-bay. There by far best ones and brake-off at the right TQ. I've tried others and the quality just is not the same.
The GM 604 crate engine typically weighs around 450 pounds (204 kg) without any accessories, such as the alternator or power steering pump. This engine is a popular choice in racing applications, particularly for its balance of performance and weight. Keep in mind that the total weight can vary slightly based on specific configurations and installed components.
I highly recommend that you buy your crate engine from GM. Quality and cheap, are incompatible. You get what you pay for. With a GM crate engine, you will not be disappointed.
350
Over 210
275 h.p.
3.48 inches.
GM crate motor, Generation 1, 4 bolt main, 2 piece rear seal, made in Mexico. 1986 or newer. Around 250 H.P.
350 cu/in block used in GM Goodwrench Crate Motor. Made in Mexico.
the biggest crate motor GM chevy makes is a 572 not a 502
GM performance part, mid 80's 290 hp
shiping weight is 400, so probaly 370 without packaging materiels
depends on which 1, the ss 454 had 255hp/405 ft-lbs