hello...i have a 91 RS 305 auto...77k like new/ runs great....i was wanting to find a motor to slowley rebuild on the engine stand for more power...i see on craigs i can buy a 90 350 4 bolt main LO5 engine for 300 obo...15k since rebuild....i have read on here you can inlarge the roller cam,biger injectors/or just raise the preshure,tuning and headers and intake and k&n...and you have a nice engine....sooo would this 350 be a good start?

 

Passenger car LO5's had roller lifters, truck LO5's did not. The majority of LO5's were put in trucks, and the majority of them were not machined for roller lifters. So, that's a crapshoot there.

LO5 heads aren't anything to write home about, but they aren't totally worthless in a mild build.

What to do with LO3 TBI for a 350 is covered in the TBI forum.

K&N is a "must-don't" in my book.

 

the motor is out of a caddi Brouhme...i'll ask if it has rollor Rockers...it does have a rollor cam...i asked

 

If its the stock caddy engine it will have roller lifters and the 305 peanut roller cam for a grand total of 185 HP/300TQ. Good thing is, it will most likely have flat-top pistons for a 9.6:1 compression ratio with 65cc chambers.

 

It certainly wouldn't have roller rockers from the factory. Roller lifters is as far as they went.

 

Until the late model 4.3 Vortec

 

Which isn't an LO5.