1989-82 360 LA Specs - Bolt on modifications

[superstock64polara]

Hi folks, can anyone provide some specs regarding the last of the LA 360's manufactured between 1989-92.
Looking to buy what appears to be a good running '89-92 360 motor, want to use a Weiand 8022, an AVS2 650, 1-5/8" long tube headers and replace the OEM hyd roller with something else. Any information would be useful, thanks.

 

[Jadaharabi]

Buy it.

Not all of the roller motors had a roller cam in them from the factory.
The 2, I have came with 308 heads. 1 with a roller cam and 1 without

 

[rumblefish360]

Everything for that “LA” is a bolt on and there is no caveat to be concerned about.

 

[Garrett Ellison]

The hydraulic roller cam equipped 360s are HD truck, van or Ramcharger models and come with a windage tray, HV oil pump, and roller timing set. If it has a hydraulic roller cam core can go to around .330-.340 lobe lift at Oregon cam grinders, which gives up to .510 lift.

 

[64mopar]

One thing to be aware of ,depending on your cam and head combinations,watch your pushrod clearance.

 

[Bewy]

If the build is going to be performance orientated & useful rpm range is 6000 or higher, I would use the 800 AVS.

 

[clementine]

watching. I picked up one of these.

 

[superstock64polara]

Thanks to everyone who posted a reply, great information.
How about some real-world experience with these mills, hydraulic roller cam recommendations, what is the advertised static comp with one of these 360's?
Do 308 heads with a little tweaking support 400HP?
Keep the great information coming.

Cheers, Chris

 

[rumblefish360]

watching. I picked up one of these.

I picked one up as well.

Thanks to everyone who posted a reply, great information.
How about some real-world experience with these mills, hydraulic roller cam recommendations, what is the advertised static comp with one of these 360's?

Comp ratio I forget. IIRC, under 9.0-1
The cam will depend on many factors.
Tell us about the car and your goal.

Do 308 heads with a little tweaking support 400HP?
Keep the great information coming.

Cheers, Chris

Yes, the head will.

 

[RustyRatRod]

Heads need work to support 400hp.

 

[Garrett Ellison]

Here are some basic head porting templates if you maintain stock valve sizes.
https://www.bigblockmopar.nl/wp-content/uploads/2016/03/MoparPortingTemplates-RB_LA_Magnum.pdf
You do want to check for cracks between the valve seats. 308 castings are known for cracking in this area. Head milling yeilds 1cc of reduction / .0048 of cut. The set I’ve measured came in at 66-67 cc’s after a .010 cut, YRMV. Proper head gasket selection goes a long way to help bump compression.

 

[dogbreath]

Best bang for the buck 360 available , most have little bore wear , bulletproof roller cam set-up , long snout cam , windage tray and all had rocker shaft oiling . Can run magnum or the excellent #308 heads both of which have the enlarged pushrod tunnels . I'm doing one now with speedpro H405CP pistons , reman magnum heads w/ hughes springs , original cam reground to 515"x 515" and 230 x 236 similar to the 360-380 grind . Needed no machine work , light cylinder hone , home crank polish , cam bearings looked like new , using new melling lifters from rockauto and a ebay chinagap intake . All in for around $2500 & will easily do 400hp.