few engine option questions

[UCNUNV]

Just a couple of question regarding future options. I have an L76 Thunder, and wanting a bit more power in NA form. When I say a bit more I mean a fair bit more. Its making 250.5rwkw with exhaust and tune.

Now what I was thinking would be cool is an LS7 Conversion. These are a 7ltr 427(ish) motor correct? Even in factory form these motors must have massive torque. How much would be involved in such a conversion? Including cost of motor how much would I be looking at drive away?

Other option is a bit less extreme. Having a 6ltr block means I can easily stroke to 402 correct? And apparently the L76 heads are very good in stock form. Would a 402 stroker kit fit the block without machining? Would simply having a stroker kit like this from C.O.M.E. or simular with the included pistons, rods and such, combined with a decent cam be a good package with standard heads and manifold? Good for maybe 350rwkw? What would I be expecting to pay for such a setup?

I know this info could be obtained from a builder, but when you have a source of info like LS1.com why not use it?

[KeenGolfer]

LS7 conversion budget around $30k. 402 budget around $15k. It's not cheap but strokers/big cubes are awesome.

Or can you do a cam job and get 300 odd rwkw for a lot less. How much do you want to spend?

[UCNUNV]

I know a small cam can get 300rwkw... but i want more than that, and streetable so huge cam for an extra 30kw isnt feasable.

I would of thought less than 15k for a 402 stroker if they heads dont need to be touched. the kits are about 2k with most of the short motors internals, stock heads, some valvesprings, a cam, stock manifold. installed and tuned.
Not saying your wrong but I though you could build a motor for 15k including new block.

[KeenGolfer]

Depends on the parts you use of course. For example as you say the COME kits are cheap or do you go Lunati which is expensive? There is still a lot of labour, machining, tuning etc. You won't get out of it for under $10k even with a cheap stroker kit.

[L-iam]

it depeneds if you can do any machining of building costs myourself as this would reduce costs as well...

[VNV8]

if you want streetability id be going for forced induction, a PD blower will give you a better low-end torque increase than a stroker bottom end. factor around $12-13K tops for a PWR kit, fitted and custom tuned with intercooler. cant beat that noise, either! check this thread out: Australian LS1 and Holden Forums (http://www.ls1.com.au/forum/showthread.php?t=89009)

[KeenGolfer]

if you want streetability id be going for forced induction, a PD blower will give you a better low-end torque increase than a stroker bottom end. factor around $12-13K tops for a PWR kit, fitted and custom tuned with intercooler. cant beat that noise, either! check this thread out: http://www.ls1.com.au/forum/showthread.php?t=89009

Sorry, I totally disagree with that statement having owned both. A stroker is more streetable IMO as it is more consistent (heat issues with PD), more reliable, sounds better (although that's subjective). I don't care what anyone says, NOTHING beats a 400+ cube stroker for all round enjoyment.

[UCNUNV]

I would rather the NA combo, because I feel like I could trust it more in terms of reliability. A blown stock motor is only going to last so long, I know some have gone forever without a hitch, but others dont. I dont want an extreem NA Combo. Like I said, 402bottom end and medium cam. Combined with stronger rods/pistons and such aswell as some good valvesprings I would expect better than stock reliability. Is that too much to expect?

What machining would be required for a L76, being the 6ltr block it already has 4"bore so I would of thougth no machining is required, I have probably overlooked something though.

[VNV8]

fair enough, youre right about the new bottom end too.

[priddy7]

What is a good size cam for a 402 stroker in a L98 .And what is the biggest cam you can go in a streetable form.eg so I can drive it everyday.