Chevy Venture 3.4 swap in to Comanche that has 2.8 GM

[Steve F]

Guys, I know this topic has been covered but most speak about the 3.4 in the camero and are old posts.  Anyone know if I can drop a saddle and carb on a 3.4 out of a 2000’s gen 3 60 degree 3 and bolt up to my tranny?  From what I think that I understand it should bolt right up.  
 

https://en.wikipedia.org/wiki/General_Motors_60°_V6_engine

[gogmorgo]

Might want to look into starter orientation. I think the biggest reason people prefer the Camarobird engine is there’s issues putting the front-wheel-drive engines in a rear-drive orientation. But I haven’t done the swap and don’t know what all is or isn’t a concern. I can imagine it’s getting harder to track down the older camarobird V6’s now though. Not exactly a desirable powertrain outside of some niche markets. 

[89 MJ]

Some FWD GM engines had different bellhousing bolt patterns despite being the same engine also. Just something else to be sure of. 

[M.T.Hands]

I also think I've heard or read that the BH is different, there are people that know and understand the various BH patterns and spacing (I'm not one of them though) but this may help if you can ID the donor pattern vs. factory 2.8

 

GM metric pattern

[edit]

 

Also called the GM small corporate pattern and the S10 pattern

This pattern has a distinctive odd-sided hexagonal shape. Rear wheel drive applications have the starter mounted on the right side of the block (when viewed from the flywheel) and on the opposite side of the block compared to front wheel drive installations. The 2.2l S10/Sonoma had the starter located in the same position as front wheel drive cars. A rear wheel drive bellhousing is displayed at right, and the integrated front wheel drive bellhousing is displayed at the lower right (in this case, as a part of the GM 6T70 Transmission).

• GM 60-Degree 2.8/3.1/3.4/3.5/3.9 L V6 (also used by AMC)
• Buick 3300/3800 V6
• Cadillac HT4100/4.5/4.9 L V8
• Isuzu all 3.2 and 3.5L DOHC V6
• AMC/Chrysler 2.5L I4 found in Jeep Cherokee, Comanche, Wagoneer, CJ and Wrangler and Dodge Dakota
• GM Iron Duke/Tech-4 2.5L I4
• GM "122" 1.8/2.0/2.2 L I4
• GM 5.3L LS4 V8
• GM High Value engine

 

Understanding SAE Bellhousing and Flywheel Measurements - Seaboard Marine (sbmar.com)