63 340 SHP Short Block on EBAY

[Greg S.]

If anyone is looking for a 870 block for a 63, one with an 0124 assembly date has been recently listed on ebay. Search for auction # 270315424299 or try this link below.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=270315424299

[Stuart F.]

Re: 63 340 SHP Short Block on EBAY

I havn't checked the block number against mine, but one quick look and I question the flat top pistons, and the breather can connection on the outside of the block - looks more like at least a 64 L-75 to me - again, first glance. Unlike many of my more learned members on the board, I can't recall part numbers or clearances off the top of my head. Sorry, but I've been on a heart/lung machine. I know, poor excuse.

Stu Fox

[Timothy B.]

Re: 63 340 SHP Short Block on EBAY

It's definately a 63 block and looks like a nice on at that. Flat tops can be changed with a professional hone. External vent bushing in the rear can be changed back to original configuration as I think the bushing is available.

What's really good is that I can't see serial # in photo and if it's void in the engine pad, this engine could find a wonderful home in a late January or Febuary car.

I don't think 4577 crank is used in 63, it's supposed to be 2680 but I think these cranks are the same and why the part # change I don't know. My 63 has 4577 crank but it also had 12/1 pistons. I have been told this crank has the same hardening treatment as the 2680 and the bearings look good by the pictures.

Getting off subject but the only problem I had with my 4577 crank was pilot hole in rear was drilled 1.084 so I had the new bushing turned .010 so fit was .002 interference. I would check this at machine shop before installation.

Stu, I hope you are OK and wish you the best.

[Mike E.]

Re: 63 340 SHP Short Block on EBAY

Block mics out at 4.035 he says--so pistons have obviously been changed to .030-over in a prior rebuild.
Casting is A223 (January 22, 63) (The day I got my driver's license--my 16th birthday!) so it is obviously a 63 block, not a 64. Casting date and assembly date are harmonious. Looks like an over the counter real deal to me--wouldn't have a serial number stamping on the pad as an over the counter puchase, and this is from the time frame before they began stamping them with a CE sequence and code.

[Michael H.]

Re: 63 340 SHP Short Block on EBAY

Block mics out at 4.035 he says--so pistons have obviously been changed to .030-over in a prior rebuild.
Casting is A223 (January 22, 63) (The day I got my driver's license--my 16th birthday!) so it is obviously a 63 block, not a 64. Casting date and assembly date are harmonious. Looks like an over the counter real deal to me--wouldn't have a serial number stamping on the pad as an over the counter puchase, and this is from the time frame before they began stamping them with a CE sequence and code.

Either the seller isn't showing the VIN stamp or it never had one. If it never had one, it had to be an "engine assembly" sold through GM parts with heads, intake etc.
Partial (short block) or fitted blocks from that era had no stamp on the pad at all.