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**mr48chev** · 09-14-2018, 01:05 PM

Welcome, Before you do anything with the stock six check the title and see if they used the engine number or the number for the door post as the vin on the title. If the engine number (next to the distributor on a machined pad) matches the vin on the title DO NOT LET THE SIX GET AWAY) until you have the title corrected to reflect an engine change. It's reasonably hassle free to get the title updated to using the number on the door post tag as the vin but you need the 6 cylinder block as proof that that is the truck you say it is. That saves a "what do I do now" post later.

Engine placement is going to be where it fits fore and aft in the engine compartment.

I have always tried to get the vertical centerline of the crank on the same level in the chassis as the old engine had. Meaning if you were to draw a straight line front to back through the crank an trans main shaft your LS and automatic would sit real close to that straight line as viewed from the side. It simplifies drive shaft angles and other issues.

As far as mounts I'd start by asking the outfit you get the C-4 installation kit from. See what they say and go from there. You would have to talk to Chassis Engineering but these mounts might work https://chassisengineeringinc.com/pr...ab-description

It seems that everyone and their shop dog are selling LS swap mounts so you may have several options there. The great part of that for you is that guys seem to come out with better swap stuff every week. On some swaps including one I have planned when the engine in my OT daily dies is oil pan clearance. Some of the LS pans hang down right into the space where other stuff has to be.

09-14-2018, 01:05 PM	#2
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,817	Re: mega noob Welcome, Before you do anything with the stock six check the title and see if they used the engine number or the number for the door post as the vin on the title. If the engine number (next to the distributor on a machined pad) matches the vin on the title DO NOT LET THE SIX GET AWAY) until you have the title corrected to reflect an engine change. It's reasonably hassle free to get the title updated to using the number on the door post tag as the vin but you need the 6 cylinder block as proof that that is the truck you say it is. That saves a "what do I do now" post later. Engine placement is going to be where it fits fore and aft in the engine compartment. I have always tried to get the vertical centerline of the crank on the same level in the chassis as the old engine had. Meaning if you were to draw a straight line front to back through the crank an trans main shaft your LS and automatic would sit real close to that straight line as viewed from the side. It simplifies drive shaft angles and other issues. As far as mounts I'd start by asking the outfit you get the C-4 installation kit from. See what they say and go from there. You would have to talk to Chassis Engineering but these mounts might work https://chassisengineeringinc.com/pr...ab-description It seems that everyone and their shop dog are selling LS swap mounts so you may have several options there. The great part of that for you is that guys seem to come out with better swap stuff every week. On some swaps including one I have planned when the engine in my OT daily dies is oil pan clearance. Some of the LS pans hang down right into the space where other stuff has to be. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.