i have a new set of the sportsman 2 heads with 64cc chambers and was wondering once and for all. do i need to elongate the pushrod holes for 1.6 rockers? i have the 3/8 studs? ive talked to jegs summit and nextgen about this subject. they all say different things to say and i need to know before i get 1.6's for sure.

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89 firebird formula


360 10:1compression (350 .060 over)/fully balnced and blueprinted
comp cams xe262 cam
performer rpm intake/port matched to heads
#1405edlebrock 600
sportsman 2 heads 64cc 2.02/1.60 valves 200cc intake runner/cnc pocket ported
msd 6al/msd8.5 super condutor wires
h.e.i. proform 50,000 volt vac. advance ditributor
700r-4 with 3.08 first gear and 3.73 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!
griffin daul1" core rad.cutom fabrication to fit(but no cutting )


future mods: 406 roller REALLY REALLY REALLY RADICAL!!!!!.with lots of NOS

 

Just get a ice pick, a snorkel, and some duct tape.. that'll fix her up.


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1986 Trans AM
355 TPI
4 Wheel Disc Brakes
9 bolt Borg Warner Rear (2.77's....oh joy) :P
6" rods, approx. 9.7:1 Compression, Stock TPI (soon to be ported), 24#/hr LTI injectors (cleaned and flowmatched by Cruizin Performance), Hedman Shorty Headers, 3" exhaust with 80 series flowmaster, SBC 993 heads completely redone and modified for 1.6 RR, 1.52 RR (for now), Comp Cams XE262-14 TPI Cam, Holley AFPR, TPIS airfoil, MSD wires, MSD 6-AL Ignition, Hypertech 53,000 volt coil.

Track times to come.

[This message has been edited by 86TpiTransAm (edited November 27, 2001).]

 

TTT

 

I would not think so. The late wp heads are designed for min.550 lift so I would think you should be ok.

 

although the heads are good for .550 lift worldproduct say u must elongat the push rod slots if u use 1.6 rockers. (the cup where the rockers sit is a lil bit furter back then the 1.5 rockers) i would call a local machine shop or even call worldproducts. if u need it i can get there number. post what u find out cause i will need to do the same when i get my sportsmen 2 heads

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when the green flag drops the bull$hit stops

Gold 85 Camaro with no motor, pulled the 2.8 to make way for a 350 wich was pulled this summer because a 406 will replace it. The 406 sports a stock bottom end with ARP bolt holding it togeter, flat top hyper pistons. Comp 282 solid cam(.528 lift with 1.6 rockers) Savin up for my Sportsmen 2 heads right now. still Have the perf RPM and 650 DP i used on the 350. Headers and 3inch exhust. Shooten for mid to low 12s next summer

[This message has been edited by GOLD85 (edited November 27, 2001).]

 

I have bent 2 pushrods so far using 1.6 rockers with Sportsman II's. I have not elongated the holes. The slots could be the problem or it could be something else but I am leaning towards the pushrod holes. I am going to put 1.5's on this spring to see if it solves my problem.

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