i was thinking about my top end build and i dont know if i should get the m1 or due the keg mod cause in not going to do a cam will i be able to bring out the full use of an m1 with just roller rockers and a porting? if not how far should i cut the runners back for my 318?

 

The M1 is for higher performance applications, on a stock to slightly stock engine you will not see any HP gains. Plus for $500-600 there is more you can do with that money to make it go faster.

If I were you just go a kegger mod for now plus an aluminum plenum pan. Also get a larger bore throttle body.

 

what size tb and what brand and how far should i cut the runners back on the keg i already have ported heads shaved 0.30 douge thorley mid lenght tri y headers full exhaust with spintech mufflers mopar performace pcm and a set of harland sharp rr on the way and i upgraded my fule system to a return system with 40 to 60 pounds of pressure. as well as a top hat filter, lost weight, and a full upgraded ignition system

 

For the TB I got mine off of Ebay it was 53mm, but I have a 5.9 with mild performance parts.

For a 5.2 i would say the 50mm
Fastman also says 50mm for the 5.2 http://www.thefastman.com/throttlebodies5x.php
Here is a 50mm http://www.ebay.com/itm/92-04-Dodge-RAM-Dakota-RT-bored-ported-50mm-t-body-V8-/230426190438?pt=Motors_Car_Truck_Parts_Accessories&hash=item35a678a266&vxp=mtr
As for the kegger here is a DIY
https://dodgeforum.com/forum/2nd-gen...e-mod-diy.html

 

TBH I noticed hp gains right away when I did my M1, to me its worth every penny considering the cost of a hughes plate and the time and effort for little to no pay off with the kegger mod. It especially shines with the bg performance tuning specifically made for the M1. Just remember its for higher RPM is all.