[Blades1_99]

I've been recommended these heads. Any pros or cons vs porting the stock heads?

M311 273cc LS3 Rectangle Cylinder Head-Complete Set | Frankenstein Engine Dynamics

High performance cylinder head and billet intake manifold manufacturer for LS, HEMI, Small and Big Block Chevy platforms. CNC cylinder head porting services. Billet aluminum intake manifold for LS1, LS3, and LS7.

frankensteined.net

Also, if I'm running a cam and ported or upgraded heads, would 90mm Tb do the job or go with the 103mm.

Thanks

I ran my 90 TB quite well, into the Jokerz 1.9. I only went 103 because...well a decent deal.