Okay, I have a new project in mind <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> I have some questions though...
1. LS1(5.7L) LM7(5.3L) and 6.0L(LQ4) engines all have the same stroke, 92mm or 3.622in. Why do they have different part numbers for the crankshaft? Are they different weights or metals?
12559354--ls1 12559357--lm7 12561302--lq4 www.gmpartsdirect.com
2. Can I just use my 5.3L crankshaft in the LS1/LS6 block? I have been told "yes" but don't know why the differnce in crankshaft part #s.
I know other people have done LS1 swaps into their trucks, but did any of you guys who have done this just swap blocks, or was it all of the accesories also? i.e. to an ls1 waterpump, altern., power str.
3. Will all of the 5.3L brackets and accessories bolt up to the LS1/LS6 block, no problems? (I will reuse all 5.3L brackets and existing 5.3L waterpump, altern., power str., a/c comp. etc.)
4. What do you think...LS6 block, existing 5.3L crank (if it should be fine), forged pistons, forged rods, arp main studs, arp head studs, arp rod bolts...rings, bearings, cam, and what forged pistons/ con.rods I'll figure out later. I will also reuse my 5.3L heads until money permits for 6.0L or LS6 heads (plus I will get more comp. ratio with the 5.3L heads for a while)...I won't spray much while they're on. And I will reuse 5.3L throttle body, intake, and (how about fuel injectors and coils?)
**It will be a short block very similar to --- this
--- with forged rods.
I know that was a lot to read and think about, but you know it was good reading <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> Thanks for your time guys <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
<small>[ March 16, 2003, 12:45 AM: Message edited by: Ryan23silverado ]</small>