ByuTrukr

Don't go too big on the cam or you'll have to change the converter, changing to a bigger gear in the rear end 3.73 or 4.10 with a locking differential will be a good start. Stay low on the degrees of the duration 212/218 sounds ok, I don't know specific cams and keep the LSA around 114* my cam is 226/226* duration .585/.585 lift 112* LSA and it needed a lot of stall on the converter and a good tune.

SILVERBIRCH

iTrader: (1)

The 212/218 is a good chioice and will work great with your stock converter that is untill you blow your tranny like it happend to me but that was just because of too much

MPFD

iTrader: (5)

TR220 on 112 with ls6 springs and a converter!!!!

I was not happy with the loss of torque I got with my 212/218 with my TB converter.
A good converter will make you grin fom ear to ear! A TR220 on a 112 and the cheaper Circle D 3200 stall will be an awesome combo with a noticeable idle and great power for a little hotrod DD truck. Gears are always good but thats where your mileage will start to drop off. If you don't care add a 4.10 to the list for sure!

All these items are gonna make you real happy for just over $1200, which is what you'll spend on heads, and you really need these things first, before the heads...

http://www.circledspecialties.com/p-...converter.aspx

http://www.thunderracing.com/catalog...id=88&pcid=122

http://sdparts.com/details/gm-perfor...parts/12499224 --minimum

http://sdparts.com/details/competition-cams/cc26918-16 --Better

http://www.pacracing.com/Street_Stri...Set_of_16.html --Best

tdrumm

iTrader: (18)

WCCH Stage I 5.3 heads. Gained 20 hp and 30 lb-ft without tuning, and the truck was a blast to drive even with a little 210/218 cam and a stock converter. I eventually went with a Yank TT3000 converter, but never got to step up to the TBSS intake and 220/218 comp cam I had custom ground to match the heads before I sold that truck off.

I have no idea what type of truck you have, whether it is 2wd or 4wd, reg, extended or crew cab, but put those heads on your 5.3 and you will be happy. Plus Richard is one of if not the most helpful sponsors on the board, and a pleasure to do business with.

You won't be dissappointed.

Y@ BoY p@Ul

My guy around her was saying somethin around a 210/ 220 or 220/220 with the oem converter and stock heads would be just fine. He also said i would prob want to think about upgrading the trans too or it'll go before to long if you got one of those heavy foots which i do lol Yaw ask what kinda truck mine is its a 03 z71 ext cab. I been lookin around and i wanted to see what yaw had to say about puttin like a ls6 intake on my truck too?

Z'06

PAC 1218 would be more appropriate than LS6 springs due to the fairly aggressive overlap of that cam.

It's ultimately going to depend on the OP's tire diameter and city v. highway mileage. 4.10 might actually be an improvement in mileage over 3.42 if the majority of his mileage is city driving.

I agree on PAC 1218 being best in this case. I think it's funny how the PAC 1218 ("Best") cost less than the Comp 918 ("Better").

budhayes3

iTrader: (19)

I think you meant ramp rate...the TR cams need more seat pressure than the LS6 springs have...can't remember the open seat pressures, but the LS6 springs have a closed seat pressure of 90# as opposed to 130# for the PAC 1218's. The PAC 1218's and Comp 918's actually have the same exact specs, except that the Comp's are known to break and the PAC's seem to have a great track record so far. It's my understanding that PAC used to make the springs for Comp, but Comp changed suppliers...probably getting a better deal on the junk their selling now.

1FastBrick

iTrader: (17)

Oh so true!!!

MPFD

iTrader: (5)

Zippy has run ls6 springs with a TR224 for a long time now with no issues and and TR220 has less lift...

budhayes3

iTrader: (19)

This is true, a bunch of guys have, but it's not recommended. I'm a big advocate of the LS6 springs, but I wouldn't run them on anything more than an XE lobe, just for the added security of stronger seat pressure and less chance of floating the valves or continuously bouncing them off of the seats. The lift isn't so much of the concern as is the aggressiveness of the lobes and the rate at which they lift and return the valves to the seats. Lingenfelter recommends LS6 springs for their cams of over .570 lift, close to or at .580 IIRC, but the lobes on those cams aren't as aggressive as say an XER or TR proprietary lobe.