Engine SwapEverything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.
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a freind of mine bought a set of milled, ported and polished factory casting LT1 heads with an intake for 400 bucks.
i know that you can modify an intake to go on an L98 or other gen 1, i know about the distributor and remote thermostat, etc, and i believe theres a thread on here where someone has actually swapped the heads onto an early block,
is this at all possible, to swap LT1 intake and heads onto an L98.
and if so what would it entail?
the car they came from made 380 rwhp, with a CC306, 58mm TB, long tubes, and custom tune.
i figure this is a nice set of mods for a thirdgen if possible.
thanks
now correct me if im wrong isnt the only difference on the vortec intake bolts, the middle two on each side???
i thought i'd heard of people boring/chamfering these bolt holes out to put a non-vortec manifold on vortec heads..?? or no?
and lastly, what about a set of vortecs made by like EQ, i think they have both old style intake bolts and vortec style...... or am i totally outta the park on this one?
Pro Torker™ Vortec heads come standard with radiused, hardened exhaust seats, multi-angled intake seats, and “Fast Burn” 64cc or 67cc combustion chambers. To ensure maximum versatility, Pro Torker™ Vortec heads feature dual pattern intake compatibility to allow use with virtually any intake manifold, early or late.
now wouldnt this be a decent combo?
64cc vortecs, milled for around 10.5:1, a decent Hyd. roller cam, LT1 manifold, TB, and headers.
i know more power could prob be made witha 4bbl buttt, this would be nice w/ the drivability/fuel economy of EFI
No, it will not fit. The intake mating flange is too narrow to cover the tall ports that the Vortec head uses. Here's a cutaway picture with a standard SBC intake mated to Fastburn heads. Fastburn heads are drilled with both standard SBC and Vortec bolt patterns.
The LT4 intake will not fit Vortec heads either. This is due to the Vortec bolt pattern being way too high on the head for the intake. The LT4 intake can be adapted to Fastburn heads because they are drilled for both standard and Vortec bolt patterns. So an LT4 intake would still require a bolt pattern change to std gen1. Some port matching on the LT4 intake will be required when using Fastburn heads.
The LT1 heads are totally different than standard SBC heads since the LT1 was reverse cooled, they don't have the water passages at the end of the heads. As for flow numbers, I honestly couldn't tell you that, but they have smaller cc's which pulls compression up to the 10.5:1 that the LT1's have. Plus they're aluminum (Vette and F-body versions) or Iron (all the other mid 90 LT1's)
These heads are different than the ones on the old '70 model LT-1 which was just a standard SBC.
The lt1 heads aren't real complicated to install on a 1st gen small block, I'm currently doing a set myself. Just cut some aluminum to block the four reverse flow ports, have it welded in place and have the head decked. Then drill and tap some holes to relieve the coolant to the remote t-stat. I went with these over vortec for two reasons: one, they are aluminum and two, the big advantage of the LT1 intake (which is easier to put on an lt1 head, obviously)
