Hey guys, wut are the main differences on the actualy block of the L98 and the LT1? Without the heads and cam and pistons etc. Wut sets the two appart, on the block itself?


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88' GTA 350 MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass

 

All of the coolant passages are cast differently for the reverse flow cooling. That and the fact that there isn't provisions for a regular distributor are the main differences.

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Black 88 GTA L98
261 RWHP, 345 RWTQ
13.406 @ 103.72 MPH
ZZ4 bottom end, Edelbrock 6085 heads, LT4 HOT cam, GMPP 1.6 RR's, ported stock TPI, SLP 1 3/4" headers, no cat, Dynomax cat-back, Stock PROM
E.T.F.A Member #11

 

it is totally different along witth tthe coolant passages thhe block is shorter from front to back as well as having a gear driven watter pump,opti spark,the only thing it shares witth an l98 is the bore spacing

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87 trans am,gm crate 350(4 bolt mains 10to1),L98 aluminum heads,LT4 hot cam,slp runners,slp 1 5/8 headers,3in.y-pipe,edelbrock base,hi flo cat,air foil,afpr,as&m ported plenum,gutted airbox,t-5 tranny w/centerforce clutch and a 3.27 9bolt(11.9in. brakes),ed wright's fastchip,relocated iat sensor,160 fan switch,tb bypass,accel supercoil,cap& rotor,hollowed maf,slp 3in. catback,a/c delete.

shooting for 13's!!!!!!!

14.10@97mph w/2.01 60'(auto ET)

slp catback is finally on!!!
fastchip prom is in.
kicks you in the A.S.S at wot.
FLOWMASTER S.U.C.K.S

 

oh, well i guess that blows my idea of putting Lt1 parts in.. Well at least still have my idea of the LS1 swap!

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88' GTA 350 MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass