Originally Posted by 86 IROC

JMHO - killer flowing set of heads... would be a bummer to not get the most out of them. I have an 04 LQ4 swapped into my 01. Stock 317s currently, with an EPS 214/220 .598/.604 111+2. It drives/tows nice, signs off early though. It is a cam geared towards a 4.8/5.3 with a 3500 stall, by the description - although I expected it to not be so mild in my 6.0L Go figure) I have a stock 80E/converter in my truck and it's fine. (stock 80E converter will flash to around 2400-2500 by my logs)

With that said, I will be installing a set of PRC Stage 2.5 59cc 706/862 heads, and already have a larger cam - 224/232, similar lift to my current cam, 114+2 LSA. I currently have a TBSS intake manifold and a NW 92mm TB on the truck - even with my current "baby" cam - it liked the upgrade. I'm switching the intake/TB to a FAST LSXRT and NW 102mm TB when I change the heads and cam. (Got a crackhead deal on them NIB) I'm running 31lb/hr 8.1L non marine injectors, swapping to 52lb/hr Gen 4 EV6 6.2L flex fuel injectors when I swap the top end.

If you are going through the effort, step up the camshaft, upgrade the intake manifold to let it breathe, and get a converter to match. You'll still be able to tow, and it won't drive horrible.

Originally Posted by 01silvy

Thanks for the info! Im definitely upgrading the cam, I have made my mind up at this point since I will be in it. If it will put out usable/strong power up until about 6k-6.5k I will be plenty happy. It’s a daily driver and honestly rarely see’s above about 4k but definitely see’s a lot lower daily driver rpm’s. Thats why I’m hesitant to go “all out” and potentially sacrifice my lower-mid range power for a lot of upper end power that I will not use often. Im kinda leaning on the summit cam(its actually in my cart on their site right now)that was recommended previously.

Originally Posted by 86 IROC

It should be, I would like to see that Summit cam on a tighter LSA with less advance ground into it. By the specs, it appears to have -2 overlap.

Originally Posted by 01silvy

Also, found out i have the 38lb injectors from deacsthwerks(probably spelled that worng). Are they still on the small side for this build? The next step up would be 44lb injectors.

Originally Posted by 86 IROC

38s on Gasoline should be fine, E85 - not so much. As for the cam, as I understand it - negative overlap helps build compression, positive will bleed it off so to speak. That was an old trick with iron head SBC/BBC engines that were on the ragged edge of static compression and octane - run a cam with some overlap to bleed some off. They didn't have the quench or combustion chamber efficiency of the modern engines. In my head I just thought 11.5:1 SCR and a 4000+ lb truck might be iffy on pump 93. I could totally be wrong and off base, just thinking out loud. My combination will yield 10.5:1 SCR and my 224/232 custom grind has 0 overlap. The cam and heads I am using came off of a friend's Gen IV 5.3L, it was 10.75:1 SCR. Slightly heavier truck than mine and smaller cubes, but it was fine on pump 93.

I like this one, 6 degrees of overlap - https://www.summitracing.com/parts/sum-8707r1

https://www.summitracing.com/parts/c...make/chevrolet - 3 degrees of overlap

https://www.summitracing.com/parts/l...make/chevrolet - 6 degrees of overlap

https://www.summitracing.com/parts/h...make/chevrolet - 5 degrees of overlap

https://www.summitracing.com/parts/b...make/chevrolet - 2.5 degrees of overlap

You get the gist... several grinds available.

Originally Posted by smokinlmm

I've got some 70lb injectors if your interested.