looking to up my performance on my 5.2 have every bolt on that I can think of competition valve job cold air intake MSD ignition twin 52 millimeter throttle body headers Flowmaster exhaust catback Mopar Performance computer underdrive pulleys what's my next step.

 

First off we'll need to see a pic of the twin 52mm throttle body setup as for what next have you considered stroking it?

 

Harland sharp 1.7 ratio full roller rockers.

 

5.9 swap? I'm happy I went that route and about every bolt on I did complemented the few extra cubic inches. Cam and double roller?

 

5.9 swap and a cam, It gets my vote! (convert to OBD2 for a nice tune)

 

Kinda wishin I had a OBDII set up after the swap ha.

 

I thought about that I'd say my 318 runs about like a 360 not that much difference in power if I was going to go that route just go boneyard Hemi.

 

the throttle body Purchased from Summit racing the Holly twin 52 millimeter billet throttle body.

 

I'll try to get a pic soon.

 

I said the same thing for years with my 318. I get more TQ starting a nice curve at lower RPMs and great top end power still. Most bolt ons are for both motors. The few extra cubic inches compliments just as well (usually a bit more). No doubt the 318 is an excellent motor but the 360 just seems to move the truck down the road with a bit less effort. Either way great blocks!