vortech heads or no vortech heads

[87s10blzr]

i have a 92 model 1 piece rear seal 350 that i bored out and cammed and i have had it in my 83 short wide silverado for bout a year and thinking about putting it in my blazer but i came across a set of vortech heads off a 98 z-71, ive been using the stock centerbolt heads that came on the 350 with no problem the 350 is .030 over with a 515 lift cam 300 duration lunati cam. and 1.6 rockers but i thought since it was out i could put the vortech since i have a performer rpm vortech head manifold. so question is i have heard vortech heads flow and perform like aluminum so should i put them on or not

[ZR1BLAZER]

if you have them. and an intake then sure throw them on. you will benifit more with the vortecs over the the crap smog heads you run now.

[stroker1]

98 vortec heads are far superior to 92 EFI heads for power. Of course you are aware the intakes are not compatible, so as long as you have a VORTEC intake why not? I'm sure you know, but remember the '87-up EFI heads have canted center bolt holes and the rest are normal old shcool intake bolts. The vortec runs only 8 intake bolts, all straight down.

[Jimmybeam]

Yeah, usually the deal breaker for people wanting vortec heads is that they have to buy a new intake. If you've already got an intake, I'd say its worth it to throw them on.

[OH_YO]

I dont know if the stock springs will handle 515 lift with 1.6's on them, atleast not without some issues, correct?

[ZR1BLAZER]

I dont know if the stock springs will handle 515 lift with 1.6's on them, atleast not without some issues, correct?
correct. about .500 with a flat tappet would be pushing it.

[87s10blzr]

ya i was gonna ahve new guides and springs put in them and maybe some valve work. what size are the valves? i havent a clue

[ZR1BLAZER]

1.94 intake 1.50 exhaust

[Sack]

The vortecs are far superior to any other head bone stock.