So,it looks like the heads are probably the original units but the short block has been changed. Thanks,guys. Clint Hooper LT5 Registry Director http://www.LT5Registry.net/ ACES #1650 http://dalesplace.com/misc/friends/clint_hooper.htm ----- Original Message ----- From: <[EMAIL PROTECTED]>
> Just to follow up on the heads, here's what Competition Cams' Scooter > Brothers had to say about the 3991492 casting in the 1989 Circle Track > article I mentioned last night: > > #2 3991492 > Good: '70 high-compression (61.2 cc), good ports, accessory bolt holes, > 2.02/1.60-valve version comes with screw-in studs and requires > special guideplates. > Bad: Close proximity of water jackets to spring pocket on 492s cast prior > to 1972. Requires seat cutter if using larger-than-stock springs. > > Brad > > > Clint: > > 3991492....70......350..........LT1,Camel hump, accessory holes,64cc, > > straight plug > > 3991492....70-up................over the counter, Camel hump,64cc, straight > > or angle plug > > Larry (Z) _______________________________________________ Chevelle-list mailing list [EMAIL PROTECTED] http://chevelles.net/mailman/listinfo/chevelle-list_chevelles.net
