need to know what i got here. valve size chamber size etc.

casting #462824

I did not find a #462824, but did find #462624.. Sometimes 3 & 6's looks like 8's..


462624.....75-86...350/400......76cc chamber, 1.72/1.5, 1.94/1.5 or 2.02/1.6 valves


mortec.com

Pierre Lafontaines' book "CHEVROLET Small Block V-8 ID Guide" lists the # 468624; but not the #462824 referred to (the #462624 is not there either); are you sure about the #'s? As 496z28 mentioned 3's, 6's, 8's, & 9's can look very similar especially with grease & gunk on them. The #468624 was made from '79 thru '85 with 1.94/1.50 valves & made from '79 thru '83 with 2.02/1.6 vavles (L-82). The L-82 head should have screw-in rocker studs & guide plates. Double check your numbers & get back with us.
Gary

_____________________________________
73 Type LT - 6 years into restoration
69 Z28 - sold in '93 after 16 years :(
2000 Z71 'Sunday Truck'
88 S10 P/U 4.3 V6 Daily driver
http://www.fquick.com/garages/viewgallery.php?action=viewimg&id=263774

the heads are on a running engine so they weren't too dirty, plus i wire brushed em off real good
i looked on mortec myself and these castings are listed as having three different valve sizes. will i need to pull the heads to find out what valves i have

edit:first 3 digits are definitely 462
last 2 are definitely 24
other # looks like an 8
like 496z28 said it could be a 3 or 6 i am fairly sure its not a 9

You will need to pull the heads and measure the valves. As already mentioned, if the heads were the L82 heads with 2.02 valves, you can see the screw in studs and guide plates just by pulling the valve covers. Since L82 engines were very low production, this is highly unlikely. To differentiate between the 1.94 and 1.72 valves, you need to measure them.

not l82s no guide plates. i think i will just save up for vortecs