Engine placement

[jonesky2]

So I’ve been building a 72 k10 short bed truck that I put a turbo 5.3l ls mated to nv4500 and a np241 transfer case. I’m using the pacific fab crossmember and I’m worried my motor is sitting too far forward. I could probably move it back 2 inches but I’m not sure how much of a difference that would make. After looking at other swaps mine seems further forward than most. Hard to tell from pictures.

[jonesky2]

here are some pictures

[Orefactory4x4 swb]

Can’t help, but man that looks good. I’d like to set up my k10 like that.

[Richard]

From the look of pics your motor is about the same place as my 6.2, maybe I am a bit further back? The front tab of the engine motor mount is about even with the back edge of axle tube but I installed the motor mount brackets opposite that you did. I used the PacFab crossmember also. Odd that your crossmember bolts through side frame and mine bolted into stock 4x4 crossmember location. Think my crossmember is further back than yours but the way I installed brackets on motor moved it forward. I could set engine back about an inch more with the firewall clearance I have, but it was a pain to get it in with the crossmember where it is now so I will leave where it is. A pic that shows measurement to pulleys, factory Camaro ZL1/Corvette spacing. My Gilmer Blower belt pulleys still have room and intake tube fits.

Edit to provide more accurate info on the belt spacing. Stock Camaro is same as truck. LSA in mine is same as Corvette. Front of pulley is 2 1/8" from timing cover. A link from the vender I got my accessory drive from. https://www.lsxconcepts.com/pages/wh...fset-do-i-need

[jonesky2]

Originally Posted by Orefactory4x4 swb

Can’t help, but man that looks good. I’d like to set up my k10 like that.

thanks!

[jonesky2]

Originally Posted by Richard

From the look of pics your motor is about the same place as my 6.2, maybe I am a bit further back? The front tab of the engine motor mount is about even with the back edge of axle tube but I installed the motor mount brackets opposite that you did. I used the PacFab crossmember also. Odd that your crossmember bolts through side frame and mine bolted into stock 4x4 crossmember location. Think my crossmember is further back than yours but the way I installed brackets on motor moved it forward. I could set engine back about an inch more with the firewall clearance I have, but it was a pain to get it in with the crossmember where it is now so I will leave where it is. A pic that shows measurement to pulleys, factory Camaro ZL1/Corvette spacing. My Gilmer Blower belt pulleys still have room and intake tube fits.

Edit to provide more accurate info on the belt spacing. Stock Camaro is same as truck. LSA in mine is same as Corvette. Front of pulley is 2 1/8" from timing cover. A link from the vender I got my accessory drive from. https://www.lsxconcepts.com/pages/wh...fset-do-i-need

Ya im not really sure. I do think my motor is still further forward than yours. I got my crossmember probably 4-5yrs ago. Ive decided im just going to try and slide my motor back as far as i can, it sucks, but from the reading ive been doing every inch is about 30 to 40lbs of weight transfer.

thanks for the response! your build is awesome!!!

[jonesky2]

Hey Richard, Is there any way you could measure off the front of your engine block to that front factory crossmember or any other reference points on the frame from the block? I want to compare it to mine. If its within a half inch of yours I might just leave it. Every thing fits like I need it to but seeing everyone elses builds makes me worried.

[Richard]

Originally Posted by jonesky2

Hey Richard, Is there any way you could measure off the front of your engine block to that front factory crossmember or any other reference points on the frame from the block? I want to compare it to mine. If its within a half inch of yours I might just leave it. Every thing fits like I need it to but seeing everyone elses builds makes me worried.

Front of engine to front edge of crossmember is 12". Tried to line up end of tape with the center V of crossmember.