I can get a great deal on a set of these heads already ported and polished with a port matched single plain intake. My question is do you guys think I will be able to keep my stock bottom end together @ 6000RPM with an Xe274. I know that these heads flow to 7000 and the cam will be good for more too, but Im really leary of my bottom end and would like to know if I can run this engine like this until I get the funds for a built short block. Thanx ------------------ 91 RS W/carbed 350, Vortec heads, performer rpm, Comp cams Xtreme energy 224/230 duration and .477/.480 lift. BFG Drag radials. 3.42 posi,Corvette servoed 700r4, 3000 stallconverter. Edelbrock TES, 3inch cat, flowmaster with single 2.5 inch exit. Best time yet to come 12's?? :crossthumbs: This is a Pic of my car in race trim www.tbns.net/billyjay/camero.jpg

if you can get the heads that cheap with intke port matched and fully ported,... well they'll make air flow's seem like air stops!!!

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89 firebird formula

356 10.5:1compression
comp cams xe262 cam
performer rpm intake
#1405 edlebrock 600
434 casting completely redone with bronze guides and 202/160 valves 64cc chambers. decked .0005 thousandths
msd 6al
h.e.i. proform 50,000 volt vac. advance ditributor
700r-4 with 3.08 first gear and 3.23 posi 7 5/8 rear end.
b trans shift kit(will kill shifts...suck dong!!)
shorty heddman hedders with custom 3" pipe y-pipe back(no damn cat!) with 40 series flowmaster!


future mods: 406 roller REALLY REALLY REALLY RADICAL!!!!!

I have a friend that has some, man they are awesome. get 'em!

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350 4 bolt main, Speed-O-Motive 383 stroker kit, re-sized rods ground for clearance,TRW Forged pistons,10.7:1 compression,HPC Coated RPM intake, Speed Demon 750 cfm carb,World Products Sportsman II heads,2.02/1.60 valves, Comp Cam 1.6 roller rockers, Comp Xtreme 284 cam,240/246@.050 with .540 lift,Crane pushrods,ATI damper,Proform HEI and MSD6A box,HPC coated 1 5/8 headers, 2.5" exhaust with 40 series mufflers,TH350 with B&M 3000 stall, Powertrax NoSlip Locker, 4.11 gears.

I have a set of T1s. They were being used on a 400 but I had 4.10 gears. I don't think you will be too happy with 3.42s and a single plane on a 350. That's a little much port volume with that gear. You got a big converter and that might be the saving grace.

Some thing you might check is the valve springs, the T1s come with 1.55s for roller cams. You can probably take out the inner spring and be about 125 lbs seat.

I think the bottom-end will hold. I seen old 350s go 6500 manytimes. Just get a revlimiter and set it at 6250.

You are changing from a 268 to a 274XE?



[This message has been edited by jcb999 (edited March 05, 2001).]

here is my .02. get the heads for the great deal. then sell them. buy something that fits your application a bit better. the track 1's have big vales and big ports. it is going to hurt you low end. I am always swaping crap around. I have a set of the phase II bowties and I got them so but cheap. like $200 they need head work to flow like some of the competition. I will just sell them for $500 or something and buy a set of iron eagle heads (550 per pair)and have $250 in the iron eagle heads.